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Ch. 10 Vocabulary
dna genetics heredity
31
Biology
9th Grade
01/22/2009

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Term
sex CS
Definition
CS determines gender
Term
autosome
Definition
non-sex CS
Term
sex-linked trait
Definition
trait determined by gene on X or Y
Term
linked gene
Definition
tend to be inherited together
Term
CS map
Definition
diagram of gene positions
Term
map unit
Definition
1% increments in frequency of crossing over
Term
germ cell mutation
Definition
gamete mutation
Term
somatic cell mutation
Definition
autosome change
Term
lethal mutation
Definition
org. cannot survive
Term
deletion
Definition
loss of DNA part
Term
inversion
Definition
reversal of gene order
Term
translocation
Definition
mov't of DNA segment to another
Term
non-disjunction
Definition
failure of HLCS to separate
Term
point mutation
Definition
only 1 nucleotide changes
Term
substitution
Definition
nucleotide replaced
Term
frameshift mutation
Definition
mutation that shifts all sequences after -> misreading
Term
insertion mutation
Definition
nucleotide added
Term
pedigree
Definition
chart showing family trait
Term
carrier
Definition
has one recessive gene which can result in disease in HL pairs
Term
genetic disorder
Definition
disease caused by CS mutation
Term
polygenic
Definition
char. influenced by many genes
Term
complex character
Definition
influenced by genes and enviro't
Term
multiple allele
Definition
more than 2 alleles for trait
Term
codominance
Definition
both genes fully expressed
Term
incomplete dominance
Definition
gene is expressed half & half
Term
sex-influenced trait
Definition
influenced by presence of X or Y
Term
Huntington's
Definition
disease w/involuntary mov'ts and less mental ability
Term
amniocentesis
Definition
screen where uterus fluid is taken to determine genes
Term
chorionic villi sampling
Definition
sample to diagnose fetal genotypes
Term
gene therapy
Definition
modifying genes to correct disease or improve genome
Term
genetic counseling
Definition
analyzing parents' genetic make up to predict children's genotype
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