BIOLOGY 304 - FINAL EXAM
QUESTIONS WITH ANSWERS LATEST
UPDATE ALREADY GRADED A+
Character trade-offs limit? - correct answer- how far
directional select can move
Do most populations meet HWE? - correct answer- No,
because environments are constantly changing
Gene flow could..... - correct answer- spread a beneficial
mutation to another population; impede adaptation by a
continual flow of inferior alleles from another population
Gene flow counteracting natural selection depends on? -
correct answer- - Distance between populations
- Mode of migration (flow)
Genetic drift vs. Natural selection - correct answer- both
mechanisms act to remove variation , but genetic drift only
happens when a population is small, while natural selection
overwhelms genetic drift in large populations.
,How can HWE be used to help find evidence of evolution? -
correct answer- If the HWE assumptions hold true for the
population, then its allele and genotypic frequencies will not
change from one generation to the next
How do you calculate frequencies? - correct answer- (#
of homozygote x 2) + (# of heterozygote) / Total # of Alleles
How does natural selection act on multi-gene traits? - correct
answer- Many traits affected by more than one gene
- Selection operates on all the genes for the trait
- Changes the population depending on which genotypes are
favored
How does natural selection effect populations? - correct
answer- some genotypes are favored over others, and
environmental conditions determine which individual (with
traits) succeed by producing more kids and surviving
how is evolution documented? - correct answer- By
measuring changes in a populations allele frequencies
, How often do Mutations occur in a population? - correct
answer- Mutations rates are very low 1 in 100,000 cell
division
- Little effect on HWE frequencies of common genes
- Most models ignore mutations
Mutation vs. Natural selection - correct answer- if
mutation rate is high, un-favored allele may remain in
population, but mutation rate rarely is high enough to counter
natural selection
natural selection cannot occur without? - correct answer-
Inheritable variation
outcome of natural selection depends on? - correct answer-
epistatic interaction between genes
Speciation allows for species integrity even in? - correct
answer- Sympatry
What are alleles? - correct answer- different forms of
the same gene
QUESTIONS WITH ANSWERS LATEST
UPDATE ALREADY GRADED A+
Character trade-offs limit? - correct answer- how far
directional select can move
Do most populations meet HWE? - correct answer- No,
because environments are constantly changing
Gene flow could..... - correct answer- spread a beneficial
mutation to another population; impede adaptation by a
continual flow of inferior alleles from another population
Gene flow counteracting natural selection depends on? -
correct answer- - Distance between populations
- Mode of migration (flow)
Genetic drift vs. Natural selection - correct answer- both
mechanisms act to remove variation , but genetic drift only
happens when a population is small, while natural selection
overwhelms genetic drift in large populations.
,How can HWE be used to help find evidence of evolution? -
correct answer- If the HWE assumptions hold true for the
population, then its allele and genotypic frequencies will not
change from one generation to the next
How do you calculate frequencies? - correct answer- (#
of homozygote x 2) + (# of heterozygote) / Total # of Alleles
How does natural selection act on multi-gene traits? - correct
answer- Many traits affected by more than one gene
- Selection operates on all the genes for the trait
- Changes the population depending on which genotypes are
favored
How does natural selection effect populations? - correct
answer- some genotypes are favored over others, and
environmental conditions determine which individual (with
traits) succeed by producing more kids and surviving
how is evolution documented? - correct answer- By
measuring changes in a populations allele frequencies
, How often do Mutations occur in a population? - correct
answer- Mutations rates are very low 1 in 100,000 cell
division
- Little effect on HWE frequencies of common genes
- Most models ignore mutations
Mutation vs. Natural selection - correct answer- if
mutation rate is high, un-favored allele may remain in
population, but mutation rate rarely is high enough to counter
natural selection
natural selection cannot occur without? - correct answer-
Inheritable variation
outcome of natural selection depends on? - correct answer-
epistatic interaction between genes
Speciation allows for species integrity even in? - correct
answer- Sympatry
What are alleles? - correct answer- different forms of
the same gene
