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Molecular Anthro Midterm
Molecular Anthro Midterm
204
Anthropology
Not Applicable
10/21/2009

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Term
molecular anthropology
Definition
using molecular bio to answer questions about human and primate evolution
Term
genome
Definition
all the genetic material contained in an organism
Term
proteome
Definition
all the proteins encoded by the genome
Term
gene expression
Definition
what is produced
Term
transcription
Definition
DNA to RNA
Term
translation
Definition
RNA to amino acids/proteins
Term
codons
Definition
set of 3 nucleotides
Term
exons
Definition
part of DNA that is transcribed and then translated to make proteins
Term
introns
Definition
part of DNA that is transcribed and NOT translated
Term
alternative splicing
Definition
several variants of one protein (isoform) from one gene
Term
gene regulation
Definition
when it's turned on and off, where, when, and how much
Term
transcription factor
Definition
protein that regulates for transcription of gene
Term
cis-regulatory region
Definition
part of DNA that affects the transcription of a nearby gene, can include activators, repressors, enhancers, promoter regions, transcription factors
Term
geneotype
Definition
what your genes look like
Term
phenotype
Definition
what your appearance looks like
Term
open reading frame (ORF)
Definition
the part of the chromosome/DNA that's being read to make proteins (from start to stop codon)
Term
recombination
Definition
chromosomes exchange chunks of their information during meiosis. this results in limiting the degree to which traits can be linked and breaks up straight lineage of chromosomes. y chromosomes don't recombine that much.
Term
alleles
Definition
alternate forms of DNA sequence at one locus
Term
polymorphism
Definition
when two or more alleles are present in the pop and the minor allele is at a frequency of at least 1%
Term
somatic mutation
Definition
non-inhertiable mutations
Term
germ-line mutation
Definition
inheritable mutation
Term
transition
Definition
substitution of C to T or A to G
Term
transversion
Definition
any change that is not a transition
Term
synonymous mutation
Definition
a mutation that does not change amino acid produced
Term
non-synonymous mutation, missense mutation
Definition
mutation that changes the animo acid produced
Term
nonsense substitution
Definition
substitution that changes the stop codon
Term
frameshift mutation
Definition
an indel that changes the ORF
Term
microsatellites
Definition
10 to 30 repeats in the DNA, aka STRs or VNTRs
Term
minisatellites
Definition
up to several kbps, aka VNTRs
Term
satellites
Definition
like minisatellites but several 100kbps, aka VNTRs
Term
LINEs
Definition
long interspersed nucleotide elements (6-8kbps)
Term
SINEs
Definition
short interspersed nucleotide elements, 100-400bps
Term
restriction enzymes
Definition
enzymes that cut the DNA into pieces after seeing a particular sequence, used for DNA fingerprinting
Term
denature
Definition
taking apart the strands of DNA with heat, melting
Term
anneal
Definition
attaching primers to DNA
Term
extension
Definition
creating the partner side of the DNA in the PCR machine to magnify the microsatellite, DNA synthesis
Term
Sanger method
Definition
getting the whole sequence of the genome by putting the terminators in w/ the PCR magnified portions of DNA, the radiation thing
Term
pyrosequencing
Definition
the type of genome sequencing where all the energy is released and that tells you what combined
Term
evolution
Definition
change in allele frequencies from one generation to the next
forces of evolution are nonrandom mating, mutation, genetic drift, migration, and selection
Term
assortative mating
Definition
choosing a partner with similar traits to you, decreases heterozygosity
Term
disassortative mating
Definition
choosing a partner with different traits than you, increases heterozygosity
Term
inbreeding
Definition
mating btwn 2 genetically related individs, decreases heterozygosity
Term
genetic drift
Definition
changes to allele frequency due to random reasons, random walks
decreases heterozygosity esp in small pops where a certain allele goes to fixation
if s<<<1/(2N), drift will dominate over selection
if 4N(mue)<<1, drift dominates over mutation
Term
fixed
Definition
at a locus, everyone in the pop has the same allele
Term
bottleneck effect
Definition
temporary and drastic reduction in population size, then recovery. some alleles might get lost
Term
founders effect
Definition
people leave a population and the daughter population does not represent the allelic diversity of mother pop, some alleles will be lost
ex: Amish people who have an increased frequency of polydactyly
Term
Fst
Definition
fixation index, measurement of pop differentiation
0=lots of gene flow
1=no gene flow
Term
selection
Definition
differential contribution of individs to next gen based on their ability to survive and reproduce
s>1/(2N)
occurs in 3 levels/stages
1. survival to reproductive age (viability)
2. attract a mate and fending off rivals (sexual selection)
3. fertility and fecundity
Term
directional selection
Definition
the dominant gene is favored AA, Aa > aa
ex: rock pocket mice
decreases heterozygosity
Term
additive selection
Definition
where the homozygous dominant genotype is favored AA > Aa > aa
Term
additive selection (codominant selection)
Definition
where the homozygous dominant genotype is favored AA > Aa > aa
Term
heterozygous advantage (overdominant selection)
Definition
where heterzygous genotype is favored Aa > AA, aa
ex: sickle cell anemia and malaria resistance
increases heterozygosity
Term
heterozygous disadvantage (underdominant selection)
Definition
where the heterozygous genotype is disfavored (not real) Aa < AA, aa
decreases heterozygosity
Term
prosimians
Definition
lorsies (Asia), galagos (Africa), lemurs (Madagascar), and tarsiers (tarsiers are closest to monkeys and apes, they are found in Asia)
Term
apes
Definition
humans, chimps, bonobos, orangutans, gorillas, gibbons, and siamangs
Term
primate traits
Definition
binocular vision, shorter snout, grasping hands, and color vision, Alu SINE
most closely related to flying lemurs
Term
phylogeny
Definition
the history of how exactly species descend from common ancestors, aka cladogram
Term
cladistics
Definition
principle that drives the creation of phylogentic trees
Term
node
Definition
when branches on a phylogeny/cladogram diverge
Term
outgroup
Definition
a species that you know has a common ancestor further back than the other species you're looking at
Term
parsimony
Definition
keep it simple: the best phylogeny is the one that uses the least amount of evolutionary events to be created
Term
convergent characteristics
Definition
traits that can be found in two species though the species aren't related (ex birds and bats both have wings)
Term
DNA DNA hybridization
Definition
Sibley and Ahlquist in 1984 used this method to find out if chimps were more closely related to humans or gorillas, combined two species DNA and saw how much heat you needed to denature it
Term
chromosomal translocations
Definition
huge mistakes in chromosomes, ex down syndrome
Term
Afrotheria
Definition
ancient group of mammals. includes elephants, manatees, golden mole, tenrec, and hyrax
Term
ramapithecus
Definition
the 12my old fossil of a human descendant. using this fossil, it seemed that humans were around at least 12mya.
Term
aki
Definition
girl who plays frisbee
Term
aki (2)
Definition
TYPE OF FRUIT
Term
humans vs. chimps
Definition
genome is different by 1.2%, split 5-7mya
humans have 46 chromosomes, other great apes have 48 (on humans, chromosomes 12&13 of great apes is combined)
chimp brain is 1/3 size of human brain
Term
Otzi
Definition
Tyrolean Ice Man, 5000y old mummy found in 1991, used aDNA to find out his diet and what weapons/gear he had
Term
human genome
Definition
under 3 billion bp
humans and mice (and nematodes) have about 25000 genes
shape discovered in Cambridge, England in 1953 by Watson and Crick
it has 46 (23 pairs of) chromosomes.
Term
nucleotides
Definition
consists of a sugar, phosphate, and a base. bases are A (adenine), T (thymine), G (guanine), and C (cytosine)...then U (uracil) is added when DNA is transcribed into RNA
Term
amino acids
Definition
proteins, codon codes for proteins, there are 20 important amino acids, poly peptide
Term
start codon
Definition
AUG, codes for methionine (Met)
Term
stop codon
Definition
UAA, UAG, or UGA
Term
junk DNA
Definition
the 70% of our DNA that is not transcribed, some plays a role in chromosome structure or gene regulation
Term
BRCA1
Definition
certain variation of this gene leads to increased risk of having breast cancer
Term
G-bands
Definition
if you stain DNA, it creates dark bands on the chromosomes. corresponds to regions of low GC content and each chromosome has a unique banding pattern
Term
y chromosome being special
Definition
contains few genes, only small portions recombine (men usually have the same the same Y chromosome as their fathers...and their fathers' fathers...etc.
Term
locus
Definition
location on chromosome where homologous genes are located
Term
mtDNA
Definition
mitochondrial DNA.
several copies of this DNA in each cell.
mtGenome is circular, not chromosomes.
codes for genes involved in metabolism. it does not recombine.
includes the D-loop which contains highly variable in regions (HVRI and HVRII)
Term
endogenous changes
Definition
when a mutation occurs because there is a misincorporation of nucleotides during replication
Term
chemical mutagen
Definition
when a mutation occurs because the involvement of other molecules that disrupt nucleotides
Term
physical mutagens
Definition
when a mutation occurs because of particularly ionizing radiation and UV radiation
Term
inversion
Definition
type of mutation where instead of the "correct" sequence being there, its reverse compliment is there
Term
types of mutations
Definition
IDIS
indels, duplications, inversions, and subsituations
Term
identical by descent
Definition
when mutations occur and are passed on to next generation
Term
identical by state
Definition
when mutation occur in multiple species b/c of the environment they are living in
Term
SNPs
Definition
single nucleotide polymorphisms.
base subs are 10x more frequent than indels
transitions are 2x more frequent than transversions
G-C islands are more prone to mutations
Term
aneuploides
Definition
departure from normal chromosomal number (ex Down syndrome)
Term
translocation
Definition
exchange of chunks of chromosomes among non-homologous chromosomes
Term
microarrays
Definition
chips with thousands of specific spots of our DNA on it, focuses on locating important SNPs in order to identity individuals.
Term
transmission genetics
Definition
concerns expected ratios of offspring genotypes, given genotypes of the parents: one parent to their offspring
Term
HWE
Definition
Hardie-Weinberg Equilibrium, nothing is going on.
p+q=1
p(squared)+2pq+q(squared)=1.
Term
Dian Fossey
Definition
studied the Karisoke Mountain gorillas in Eastern Africa
Term
patrilocal
Definition
males stay close to each other and stay w/in their natal region while female migrate farther from home (ex harem structure of western gorillas)
Term
MHC
Definition
major histocompatibility complex, example of disassortative maing where people want to mate w/ people who have different MHC components than them b/c if deals with defense against pathogens.
t-shirt study
Term
mutation
Definition
only source of completely novel genetic variation, increases heterozygosity
if 4N(mue)>>1, mutation dominates over drift
Term
codominance
Definition
when neither allele is dominant or recessive, inheritance is additive
ex: AA=red flower, aa=white flower, Aa=pink flower
Term
RA Fisher
Definition
expanded Darwin's def of selection
also a statistician and founder of pop genetics and a Eugenicist
Term
s
Definition
the degree of selection for (+s) or against (-s) a particular genotype
deviance from relative fitness (relative fitness = 1)
Term
monotremes
Definition
egg laying mammales, split from humans about 190mya
Term
marsupials
Definition
mammals that give live birth w/ particular development of embryo, split from humans 100mya
Term
eutherian mammals
Definition
placental mammals, the group primates are in!
Term
monkeys and apes
Definition
anthropoid
Term
strepsirhines
Definition
lemurs, lorsies, and galagos
Term
haplorhines
Definition
tarsiers, new & old world monkeys, and apes
Term
old world monkeys
Definition
divided into two types
1. colobines: mostly Asian
2. cercophitecines: mostly African
Term
New World monkeys
Definition
grasping tails, Central and South America
Term
Asian primates
Definition
gibbons, siamangs, orangutans, tarsiers, and lorsies
Term
molecular clock
Definition
belief that you can calculate how old last common ancestor is if mutations occur in clock-like frequency.
founders of the idea were Sarich & Wilson in 1967
Term
Ida
Definition
masillae darwinius
47mya, female who died when 9-10 months old
95% complete: guts help us determine its diet
discovered by John Hurun
Term
aDNA
Definition
ancient DNA, upper limit thought to be 1mya
400,000y old plant DNA from Siberian permafrost cores is the oldest DNA recovered
100,000y old Neanderthal molar form Belgium is the oldest primate DNA recovered
easily degraded so you need 3 things to have good preservation:
1. rapid desiccation (dry)
2. low temperature (cool)
3. high salt concentration
in 1997 a small segment of mtDNA from Neanderthal was sequenced
Term
Neanderthals
Definition
fossils discovered in Germany's Neander Valley in 1856
traits include no chin, large elongated brains, stocky bodies, cold adapted, lots of trauma
found in Europe & Asia 400,000-24,000ya
in 1997 a small segment of mtDNA from Neanderthal was sequenced
Term
vegetarian spiders
Definition
scientists discovered Bagheera Kiplingi jumping spider, inhabits a region in SE Mexico and Costa Rica
maybe a case of horizontal gene transfer
Term
domesticating dogs
Definition
domesticated in China about 11,000-14,000ya
Term
Allan Wilson
Definition
looked at species and gene trees of chimps, gorillas, and humans to solve trichotemy
Term
Ardipithecus
Definition
knuckle walker, small brain, 4.4mya
Term
Turkish infant
Definition
infant is homozygous for a gene variant that is known to cause congenital chloride diarrhea.
used microarrays for the test
Term
protein evolution
Definition
human uniqueness is due to rapidly evolving proteins; changes to exons
Term
deletions or copy number changes
Definition
difference btwn humans and chimps is because we have lost or duplicated key genes
Term
gene regulatory evolution
Definition
differences btwn chimps and humans are due to differences in the expression (when and where) of particular genes
Term
microRNA
Definition
chunks of RNA that are just 21-23 bases long
highly conserved throughout evolution
don't code for proteins,but seem involved w/ gene regulation
RNA silencing/interference
Term
Clark et al 2003
Definition
compared 7645 coding genes in chimp, human, and mouse and found genes associated with immune defense, cell signaling, amino acid metabolism, olfaction, hearning (ex TECTA)
Term
Enard et al 2002
Definition
comparing gene expression profiles, used micro-arrays to analyze gene expression differences and found out that humans have more mRNA, so more expression, in their blood, liver, and brain tissues than do chimps or rhesus monkeys
Term
MYH16
Definition
gene related to jaw musculature
humans have a frameshift mutation so that they don't have this protein in their jaw muscles
change perhaps due to change in diet
Term
ASPM
Definition
gene related to brain size and development
associated with microcephaly
Term
FOXP2
Definition
gene associated with development of speech and language
discovered via study of KE family (British family)
conserved amino acid sequence (only 1aa change from mouse to chimp, but 2aa change in humans)
2aa changes went to fixation about 200,000ya
Enard et al 2009 tested FOXP2 variant in mice
Term
Tospeak
Definition
Aussie family w/ speaking disorder had a variant on chromosome 8
production of tospeak RNA was involved w/ larynx development
breakdown btwn tospeak and GDF6 can lead to fused bones in wrist and feet
Term
Enard et al 2009
Definition
put human variant of FOXP2 in mice and it increased neuron plasticity and connectivity and changed the pitch of ultrasonic vocalizations
Term
ASPM
Definition
Evans et al 2004, Kouprina et al 2004, Zhang 2003
loss of function mutations at this gene cause microcephaly (reduced brain size)
Term
Phi hHaA
Definition
hair keratin gene
in humans this gene is inactive
Term
OR 912-93
Definition
olfactory receptor
in humans there is an amino acid substitution
Term
PDNY
Definition
gene associated w/ brain development
in humans there is a regulatory change
Term
CMAH
Definition
gene associated w/ pathogen resistance
in humans this gene is lost
Term
monkeys are better at estimating
Definition
research at Brannon Lab @ Duke
monkeys better at fuzzy math whereas humans are good at precise math
monkeys were two females named Boxer and Feinstein
Term
good preservation conditions for aDNA
Definition
rapid desiccation (dry)
low temp (cool)
high salt concentration
Term
deamination
Definition
chemical change to structure of the nucleotides that occurs post-mortem
leads to insertions of an extra nucleotide or change a nuceoltide after death
Term
amino acid analysis
Definition
type of aDNA control where you run tests to see if there are amino acids presents in the sample
Term
extraction controls
Definition
control used for aDNA where you create mock controls of extraction and PCR reactions with no DNA in them to allow to test for false positives (a false positive would mean that your sample is contaminated)
Term
homo floresiensis
Definition
18,000y old fossil discovered in 2003 on Flores Island, Indonesia
female adult, 3ft tall, huge feet, small brain
Term
Anatomically modern humans
Definition
earliest fossile 200,000-150,000ya in Africa
first appear in European fossil record 40,000ya
traits include: round tall skull, vertical forehead, small brow ridges, small face and teeth, gracile skeleton and skull
Term
multiregional model
Definition
humans evolved more or less simultaneously across the entire Old World from several ancestral populations
Term
out of africa model
Definition
rapid-replacement model
modern humans evolved in Africa and then migrated throughout Old World
AMH migrated out of africa 1.8mya
Term
Neanderthals vs. AMH
Definition
split 290,000-440,000ya
still debating about interbreeding, but looks like no interbreeding
Term
teosinte
Definition
domesticated in the New World 4,000-7,000ya
Term
Archaic Homo sapiens
Definition
preceded AMH
Africa-350,000-200,000ya
Asia-350,000-130,000ya
Europe-350,000-130,000ya
Term
Mitochondrial Eve
Definition
Cann et al. 1987
first major construction of human phylogeny
Term
coalescence theory
Definition
flip side of divergence
tracks the genetic history of a particular genetic locus back in time
Term
American Indians
Definition
group of modern humans with smallest amount of genetic diversity
Term
haplotype
Definition
a particular set of alleles, linked on the same chromosome, that are transmitted together
when chromosomes recombine, they recombine in chunks: these chunks are called haplotypes
Term
haplogroups
Definition
groups of haplotypes
Y chromosome haplogroups: organized using alphabet, A being the oldest
mtDNA haplogroups: organized using L, L1 being the oldest
Term
Migration using haplogroups
Definition
1. 150,000ya L1 mtDNA lineage spreads thru Africa
2. 75,000ya L2 and L3 spread thru Africa
3. 60,000ya L3 migrate out of African giving rise to M and N
4. 30,000-50,000ya migration throughout Eurasia (including Aussie by 45,000-50,000ya)
Term
Lake Mungo
Definition
fossil dating 40,000ya
oldest human skeleton in Aussie
Term
four major regions particularly influences by changes in sea level
Definition
BESS
1. Bering Strait
2. English Channel
3. Sahul
4. Sunda Shelf
Term
hypotheses regarding the peopling of the Americas
Definition
BAPP
1. Bering Land Bridge (interior)
2. Atlantic Crossing
3. Pacific Coastal (coastal)
4. Pacific Crossing
major migration happened 20,000ya
Term
Paleoindians
Definition
early Americans
traditional idea: clovis (spear point) first
earliest ones dated about 13,000ya
big game hunters
appeared suddenly in short period of time
Term
monkey music
Definition
David Teie, cellist for National Symph Orch & Chalres Snowdon, physcologist
composed music tailored to the pitch, tempo, and tone of monkey calls
monkey's only response to human music was being calmed by Metallica's "Of Wolfe And Man"
Term
genomic zoo
Definition
goal was to collect and sequence DNA of 10,000 vertebrate species
Term
race
Definition
division of the human species based on differences in phenotype that are determined by genotype
Term
Johann Blumenbach
Definition
in 1775 he created a systematic classification system for humans based on size of crania
4 major groups:
1. African
2. Asian (or Mongoloid)
3. Caucasian
4. American Indian
Term
Franz Boas
Definition
early 20th cent, studied immigrant families in America and found no support for the taxonomy of human variation
cranial proportions are largely influence by environment
Term
Richard Lewontin
Definition
study in 1972 showing that there was little genetic variation w/in pop, btwn pops w/in a race, and btwn races
most human diversity found w/in pops (85%)
diversity btwn pops w/in a race was 8.3%
diversity btwn races was 6.3%
Term
Fst for human pop
Definition
0.092 for ACE Alu insertion
Term
horse genome
Definition
sequencing of horse named Twilight began in 2006 for $15 billion sequencing 2.7billion bps
horses were domesticated btwn 4,000-6,000ya
centromere: part of chromosome that contain satellites
larger than dogs', but smaller than cows' and humans' and have 53% similar to humans'
Term
HERC2
Definition
gene on chromosome 15 associated w/ and likely causative of blue vs. brown eye color in humans
it's an intron! it probably effects regulation of OCA2
Term
OCA2
Definition
codes for P protein which helps determine pigment
Term
TYR
Definition
codes for Tyrosinase that affects pigment. Siamese cats have C allele there which causes dark pigment production but how much pigment is produced depends on temp of skin
Term
MCR1
Definition
effects melanocite production
in red heads, they have recessive alleles which means more phaeomelanin then eumelanin is produced
same allele effects UV radiation sensitivity
these haplotypes arose 30,000-80,000ya in Europe
Term
pleiotropy
Definition
when a single locus influences more than one trait
Term
continuous traits
Definition
polygenic traits
traits that very in phenotype along the cline (ex skin color, eye color)
bell curve distribution
Term
discrete traits
Definition
clearly defined categories of phenotypes
Term
stabilizing/balancing selection
Definition
if average is more fit than others, then bell curve will span over a smaller variety of the trait
Term
DARC
Definition
duffy locus which encodes a blood group antigen that confers resistance to malaria.
has a high Fst
Term
ADH
Definition
gene associated w/ Asian flush, high Fst value
Term
AMY1
Definition
codes for enzyme Amylase which helps break down starch, more copies means more amalyse in saliva
Term
LCT
Definition
codes for lactase and enables your body to digest lactose
Term
simple disease
Definition
strongly influenced by a single gene
follows Mendelian inheritance
individs w/ mutation usually manifest the disease phenotype
Term
complex disease
Definition
influenced by many genes and environment
do not follow straightforward Mendelian inheritance
individs w/ mutation may not manifest phenotype
Term
incidence
Definition
number of people who develop a disease over a particular period
Term
prevalence
Definition
number of people who have the disease at any one time
Term
Duchenne Muscular Dystrophy (DMD)
Definition
extreme muscle weakness
indidence 30/100,000 males
usually caused by defect at the gene for dystrophin (largest gene in genome!)
Term
dystrophin
Definition
largest gene in the human genome (70 exons, 2.4Mb, .1% of genome)
associated with DMD (Duchenne Muscular Dystrophy)
Term
cystic fibrosis
Definition
lung congestion
common among Europeans
affected individs carry 2 inactive copies of CFTR on chromosome 7
Term
CFTR^F508
Definition
gene on chromosome 7
helps regulate fluid secretion across cell membranes
associated with Cystic Fybrosis
has deletion of a single amino acid (phenylalanine) at position 508
Term
CCR5^32
Definition
gene associated with HIV resistance
found mostly in Northern Europe and NW Asia
Term
CYP2D6
Definition
gene responsible for developing enzymes/proteins that metabolize stuff
more copies you have, the better your are at metabolizing
Term
SLC6A4
Definition
serotonin transporter
social anxiety, depression, alcoholism
Term
DRD4
Definition
dopamine receptor
risk taking and novelty seeking, ADHD
Term
COMT
Definition
fear response
Term
MAOA
Definition
degrades serotonin
leads to aggression
Term
AVPR1A
Definition
vasopresisn receptor
male "bonding" behavior
monogamy gene (ex prairie voles who are monogamous have longer variant than mountain and meadow voles who are promiscuous)
Term
ELSI
Definition
ethical, legal, and social implications research program
Term
endogamy
Definition
marrying within in the same cultural group
decreases heterozygosity
Term
Whole Genome Association
Definition
type thousands of markers thruout genome for numerous affected and unaffected individs
helps find candidate genes for certain diseases
Term
pharmacogenetics
Definition
genetics perspective on individs variation in response to pharmaceutical drugs
ex studies CYP to find out how good people are at metabolizing medicines
Term
local adaptation
Definition
changes in genome to deal w/ geographic area where you live
for example, DARC (duffy locus), MCR1 making pale skin in Northern Europe
Term
model organism
Definition
a species that is extensively studied, usually experimentally, to understand biological processes
mouse is a good example of this
Term
junk DNA
Definition
influence the activity of nearby genes
3% of genome is actual genes
tandem repeats allows animals to adapt quickly
Term
Neolithic Age
Definition
defined by advanced in tool construciton
change in economy and human lifeway (people start making pottery!)
Term
teosinte
Definition
ancestor of maize
domesticated btwn 7,000-4,000ya
increased number of kernels per cob and cob size
Term
acculturation
Definition
new pops learn agriculture from neighboring groups
Term
Gene therapy
Definition
Corey Haas had Leber's Congenital amaurosis (LCA)
affected by RPE65 gene
Term
most common recent ancestor for homo sapiens from diff regions
Definition
90,000-180,000ya
original pop size was about 10,000
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