Bio 1407 Exam 1 (Chapter 22,23,24,25) Questions With
Complete Solutions
_ causes the frequency of certain alleles in a population to vary
over time Correct Answers natural selection
_ is responsible for inherited traits Correct Answers genes
2 inferences by darwin Correct Answers Individuals who
inherited traits give them a higher change of surviving
contribute more offspring than other individuals
there is an unequal ability of individuals to survive and
reproduce which leads to an accumulation of favorable traits in a
population over many generations
2 types of balancing selection Correct Answers heterozygote
advantage
frequency dependent selection
2 ways genetic drift can be cause Correct Answers founder
effect
bottle neck effect
2pq Correct Answers freq of heterozygous individuals/geno
3 mechs to change allelic freq Correct Answers nat selection
(only this is adaptive)
genetic drift
gene flow
,3 possible outcomes for species that meet in hybrid zones
Correct Answers 1. reinforcement: strgnthing of reproductive
barriers and H eventually cease to occur
2. fusion: wekang of reproductive barriers and species fuse
3. stability: continued formation of hybrids
3 types of post barriers Correct Answers reduced h viability,
reduced h fert, hybrid break down
3 ways separate populations may evolve indepehtingly in
allopatric speciation Correct Answers mutatin
ds
genetic drift
4 observations by darwin Correct Answers Members of a
population vary in traits
traits are passed from parent to offspring
all species are capable of producing more offspring than the
enviroment can support
most offspring do not survive
4 reasons why NS can't make perfect creatures Correct Answers
selection can only act on existing variations
evolution is limited by historical constrains
adaptations are often compromises
, chance, NS and the environment interact
4 stages of the hypothesis for the origin of life Correct Answers
1. Abiotic syn of small organic molecules
2. Joining of these into poly mess
3. protobionats
4. origin of self replicating molecules
4 things all vert embryos posses Correct Answers post anal tail
pharyngeal arches
flexible notochord
dorsal hollow nerve cord
5 conditions for non evolving populations to be in HWE
Correct Answers no mutations
random mating
no nat selection
large pop size
no gene flow
5 types of data used to document evolution Correct Answers
Direct observation
Homology
Comparative embryology
The fossils record
biogeography
5 types of prezygotic barriers Correct Answers habitat isolation
temporal
behavioral
Complete Solutions
_ causes the frequency of certain alleles in a population to vary
over time Correct Answers natural selection
_ is responsible for inherited traits Correct Answers genes
2 inferences by darwin Correct Answers Individuals who
inherited traits give them a higher change of surviving
contribute more offspring than other individuals
there is an unequal ability of individuals to survive and
reproduce which leads to an accumulation of favorable traits in a
population over many generations
2 types of balancing selection Correct Answers heterozygote
advantage
frequency dependent selection
2 ways genetic drift can be cause Correct Answers founder
effect
bottle neck effect
2pq Correct Answers freq of heterozygous individuals/geno
3 mechs to change allelic freq Correct Answers nat selection
(only this is adaptive)
genetic drift
gene flow
,3 possible outcomes for species that meet in hybrid zones
Correct Answers 1. reinforcement: strgnthing of reproductive
barriers and H eventually cease to occur
2. fusion: wekang of reproductive barriers and species fuse
3. stability: continued formation of hybrids
3 types of post barriers Correct Answers reduced h viability,
reduced h fert, hybrid break down
3 ways separate populations may evolve indepehtingly in
allopatric speciation Correct Answers mutatin
ds
genetic drift
4 observations by darwin Correct Answers Members of a
population vary in traits
traits are passed from parent to offspring
all species are capable of producing more offspring than the
enviroment can support
most offspring do not survive
4 reasons why NS can't make perfect creatures Correct Answers
selection can only act on existing variations
evolution is limited by historical constrains
adaptations are often compromises
, chance, NS and the environment interact
4 stages of the hypothesis for the origin of life Correct Answers
1. Abiotic syn of small organic molecules
2. Joining of these into poly mess
3. protobionats
4. origin of self replicating molecules
4 things all vert embryos posses Correct Answers post anal tail
pharyngeal arches
flexible notochord
dorsal hollow nerve cord
5 conditions for non evolving populations to be in HWE
Correct Answers no mutations
random mating
no nat selection
large pop size
no gene flow
5 types of data used to document evolution Correct Answers
Direct observation
Homology
Comparative embryology
The fossils record
biogeography
5 types of prezygotic barriers Correct Answers habitat isolation
temporal
behavioral
