BIO 100 EXAM 3 EXAM REVIEW QUESTIONS
AND CORRECT ANSWERS
◉ 4 sources of variation.
Answer: single gene mutation
gene duplication and divergence
exon shuffling
recombination
◉ mutation.
Answer: direct CHANGE IN THE DNA of an individual- is the ultimate
source of all genetic variation in a population
◉ 2 ex of a mutation.
Answer: 1. sickle cell- one amino acid is not in correct place
2. frog wih two extra legs
◉ mutation is an alteration of what.
Answer: the base pair sequence of an individuals DNA
◉ when the alteration of a mutation occurs in a gene,.
,Answer: the change in the DNA sequence may change the allele
◉ how can gene mutations be caused by.
Answer: mistakes in DNA replication
collisions of the DNA molecule with other molecules
damage from heat or chemical agents
◉ mutations in an organisms what can be inherited.
Answer: gametes
◉ single gene mutation.
Answer: mutations alter old genes
some are harmful, some are helpful, and some are neutral
ex= 1234567891011, mutation= 1234561291011
◉ most single gene mutations are what.
Answer: deadly
◉ gene duplication.
Answer: chance error created two copies of a gene
one gene retains the original function
a mutated copy takes on a new function
,ex= 1234567 parent, 1234567 parent= offspring is 1234267=
MINOR CHANGE, offspring- 1284597= MAJOR CHANGE
◉ gene recombination occurs when.
Answer: in meiosis
◉ genetic recombination.
Answer: shuffling the existing alleles around
frequency of alleles in a populations gene pool remains the same
ex= A and B paren, a and b parent= offspring is A and b
◉ would shuffling a deck of cards be a good example of genetic
recombination.
Answer: No, because there would be a lot more genes
◉ exon shuffling.
Answer: exon number change
◉ evolution changed when what occurs in a pop change.
Answer: allele frequencies
◉ 4 agents of evolution.
, Answer: mutation
gene flow
genetic drift
natural selection
◉ most important agent of evolution.
Answer: natural selection
◉ mutations.
Answer: changing an original allele into a new one
natural selection will act upon the new allele
◉ gene flow.
Answer: physical flow of alleles into a population through migration
changes in allele frequencies in a pop due to migration or
immigration
◉ what is important for the evolution of antibiotic resistant bacteria.
Answer: gene flow
◉ genetic drift.
AND CORRECT ANSWERS
◉ 4 sources of variation.
Answer: single gene mutation
gene duplication and divergence
exon shuffling
recombination
◉ mutation.
Answer: direct CHANGE IN THE DNA of an individual- is the ultimate
source of all genetic variation in a population
◉ 2 ex of a mutation.
Answer: 1. sickle cell- one amino acid is not in correct place
2. frog wih two extra legs
◉ mutation is an alteration of what.
Answer: the base pair sequence of an individuals DNA
◉ when the alteration of a mutation occurs in a gene,.
,Answer: the change in the DNA sequence may change the allele
◉ how can gene mutations be caused by.
Answer: mistakes in DNA replication
collisions of the DNA molecule with other molecules
damage from heat or chemical agents
◉ mutations in an organisms what can be inherited.
Answer: gametes
◉ single gene mutation.
Answer: mutations alter old genes
some are harmful, some are helpful, and some are neutral
ex= 1234567891011, mutation= 1234561291011
◉ most single gene mutations are what.
Answer: deadly
◉ gene duplication.
Answer: chance error created two copies of a gene
one gene retains the original function
a mutated copy takes on a new function
,ex= 1234567 parent, 1234567 parent= offspring is 1234267=
MINOR CHANGE, offspring- 1284597= MAJOR CHANGE
◉ gene recombination occurs when.
Answer: in meiosis
◉ genetic recombination.
Answer: shuffling the existing alleles around
frequency of alleles in a populations gene pool remains the same
ex= A and B paren, a and b parent= offspring is A and b
◉ would shuffling a deck of cards be a good example of genetic
recombination.
Answer: No, because there would be a lot more genes
◉ exon shuffling.
Answer: exon number change
◉ evolution changed when what occurs in a pop change.
Answer: allele frequencies
◉ 4 agents of evolution.
, Answer: mutation
gene flow
genetic drift
natural selection
◉ most important agent of evolution.
Answer: natural selection
◉ mutations.
Answer: changing an original allele into a new one
natural selection will act upon the new allele
◉ gene flow.
Answer: physical flow of alleles into a population through migration
changes in allele frequencies in a pop due to migration or
immigration
◉ what is important for the evolution of antibiotic resistant bacteria.
Answer: gene flow
◉ genetic drift.
