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Final Study-Biology
Final Review
46
Biology
Undergraduate 1
12/01/2010

Additional Biology Flashcards

 


 

Cards

Term

Visual Learners

 


Definition

Like illustrations, tables, video

Think in pictures

Notice expressions, gestures, body language

Term

Auditory Learner

Definition

Traditional lectures are helpful

Material is clearer after hearing it

Listen to tone, speed, and mannerism

Term
Tactile Learners
Definition

Enjoy hands on learning activities

Fidget or doodle during lecture

Like to be physical while learning

Term
Scientific Method
Definition

  • Observing
  • Proposing Ideas
  • Testing
  • Discarding those ideas that fail

Term
Hypothesis
Definition

Proposed explaination

  • Testable and potentially falsifiable

Term
Scientific Theory
Definition

Powerful, broad explaination

Rests on many hypotheses that have been tested

Term
Inductive Reasoning
Definition
Combining a series of specific observations into a generalization
Term
Experiment
Definition
contrived situations
Term
Variables
Definition
factors that can change in value under different conditions
Term
Independent Variable
Definition

A factor that can be manipulated/change 

  • graphed on x-axis

Term
Dependent Variable
Definition

A factor that cannot be changed

  • graphed on y-axis

Term
The Cell Theory
Definition

all organisms are composed of cells

  • divide to reproduce

Term
Elements
Definition
fundamental forms of matter
Term
Atoms
Definition

the smallest units of an element

 

  • composed of protons, neutrons, electrons
  • Electron: negative charge
  • Protons: positive charge
  • Neutrons: neutral charge
Location
Electron are outside the nucleus
Protons/Neutron within the nucleus  

 

Term
A Definition of Life
Definition

But all living organism

 

  • Grow and develop
  • Reproduce
  • Utilize energy-metabolism
  • Respond to the environment
  • Maintain homeostasis
  • Evolve

 

Term
Cancer
Definition

Unregulated cell division

 

  • divide when they shouldnt
  • invade surrounding tissues
  • move to other locations in the body

 

[image]

Term
Karyotype
Definition

An organized profile of an individual's chromosomes. Chromosomes are arranged and numbered by size, from largest to smallest

Autosome: non-sex chromosomes [twenty-two chromosome]

Sex Chromosome: X or Y chromosome [twenty-third chromosome]

[image]

Term
Chromosome
Definition

One molecule of DNA is wrapped around proteins to a form a structure containing hundreds of genes 

 

  • Chromosome are uncondensed before cell division
  • Duplicated chromosome, held together at the centromere: sister chromatids
[image]

 

Term
Homologous Pair of Chromosomones
Definition

contains the same gene

Different version of the gene: allele

 

  • Same function
  • Different DNA sequence
[image]

 

Term
Haploid vs. Diploid Cell States
Definition

Haploid

 

  • gamete
  • one set of chromosome (n)
  • created-Meiosis
Diploid
  • somatic cells
  • two set of chromosome (2n)
  • zygote; egg/sperm cells

 

Term
Meiosis I
Definition

separates the members of homologous pairs

 

  • Resulting cells are haploid
Stages of Meiosis
Interphase
DNA replication
Prophase 
DNA condense into chromosome
Crossing over
Nuclear Envelope disappear
Metaphase
Homologous pair align at the center
Random alignment
Anaphase
Homologous pairs are separated
Telophase 
Two daughter cells-produced

 

Term
Meiosis II
Definition

Separates the sister chromatids

 

  • Produce genetically unique haploid cells
Stages of Meiosis
Prophase
Nuclear envelope disappears
Metaphase
Chromosome align at the center
Anaphase
Sister Chromatids are separated
Telophase
Four haploid daughter cells result

 

 

Term

Crossing Over

 

 

 

 

 

Definition

Exchange of equivalent portions of chromosomes between members of a homologous pairs

 

  • Results in new types of gametes being formed

Term
Random Alignment
Definition

The way in which different pairs of chromosomes align and get separated during meiosis I-random

 

  • Results in different types of gametes being formed

Term
Mitosis
Definition

Produces genetically identical daughter cells

  • Separates sister chromatids
Stages of Mitosis
Prophase
Nuclear Envelope disappears
Microtubules pull the chromosome toward the middle
Prometaphase
Proteins attach to the centromeres creating the kinetochores
Metaphase
Chromosome are aligned across the metaphase plate
Anaphase
Sister Chromatids separates
Telophase
Nuclear envelopes reform around chromosomes
Chromosomes revert to uncondensed form

Term
Nondisjunction
Definition

Failure of homologous to separate normally during meiosis

  • Results in a gamete having too many chromosomes-trisomy or one too few chromosomes-monosomy
Ex: Down-syndrome; Turner Syndrome

Term
 Sexual Reproduction 
Definition

Creations of gametes, which are combined from two parents

  • Offspring are genetically different from one another and from the parents

Term
Inheritance
Definition

  • Mother's egg and father's sperm each contain half of the information to build a human
  • This single cell contains all the information on how to build the human

Term
Genotype
Definition

Description of the alleles for a particular gene in an individual

Types:

  1. Homozygous
  2. Heterozygous

Term
Phenotype
Definition
Physical traits of an individual
Term
Homozygous
Definition
both alleles for a gene are identical
Term
Heterozygous
Definition
the gene has two different alleles
Term
Recessive
Definition
the phenotype of an allele is seen only when homozygous
Term
Dominant
Definition
the phenotype is seen when homozygous or heterozygous
Term

Punnet Square/Probability

 

Curly hair is recessive; straight hair is dominant. A heterozygous woman with curly hair marries a men, who is a homozygous dominant character for straight hair. Predict the outcome-children

 


Definition
Fifty-Fifty chance--the offspring will have either straight or curly
Term
Genetic Disease
Definition

Carriers of these disease--Heterozygotes

  • Cystic fibrosis

A recessive human genetic disease

  • Huntington's disease
A dominant human genetic disease

Term
Quantitative Traits
Definition

Show continuous variation of large range of phenotypes

 

Heritability

Proportion of the variation within a population due to genetics difference among individuals

 

Polygenic Traits

Results of several genes

Each with more than one allele

Term
X-linked gene
Definition
Are located on the X chromosome
Term
Sex Determination 
Definition

  • When an X-bearing sperm fertilizes the egg cell, a female results
  • When a Y-bearing sperm fertilizes, an male results

Term
X inactivation
Definition

When a string of RNA is wrapped around the chromosome
  • Guarantees that all females actually receive only one dose of the proteins produced by genes on the X chromosome
  • Occurs in all of the cells of a developing female embryo; about the time that embryo implants in the uterus

 

Term
Gene Expression
Definition
The process of using instructions carried on a gene to create proteins
Term
DNA 
Definition

 

  • Double-stranded
  • Each nucleotide composed of deoxyribose, phosphate, and nitrogenous base
Bases:
  1. Adenine
  2. Thymine
  3. Guanine
  4. Cytosine

 

Term
RNA
Definition

 

  • Single-stranded
  • Nucleotides comprised of ribose, phosphate and nitrogenous base

 

Bases:

 

  1. Adenine
  2. Guanine
  3. Thymine
  4. Cytosine
  5. Uracil-pair with adenine

 

Term
Steps of Protein Synthesis
Definition

Transcription

  • located in the Nucleus
  • DNA-->RNA
  • produce RNA

RNA Process

  • located in the RNA polymerase
  • RNA-->mRNA
  • produce mRNA

Translation

  • located in the Cytoplasm
  • mRNA-->tRNA
  • produce amino acid

Protein Process

  • located in the Rough Er
  • amino acids-->protein
  • produce protein

Term
Codon/Anticodon
Definition

Codon

Sequence of mRNA to code for a specific amino acid

 

Anticodon

Sequence of tRNA to match with the codon

Term
Mutations
Definition

Change in genetic sequence

  • Changes in genetic sequence might affect the order of amino acids in a protein
  • Protein function-dependent on the precise order of amino acids
Possible Outcomes:
  1. No change in protein/Neutral Mutation
  2. Non-functional protein
  3. Different protein
Types of Mutation:
Base-Substitution
Simple substitution of one base for another
Frameshift
addition/deletion of a base

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