Topic 5 -Genetics Review

Question 1

Phenotype plasticity

Answer 1

the ability of a genotype to alter its phenotype expression under different environmental conditions

Question 2

phenotype variation can be one of two ways

Answer 2

discrete or continuous

Question 3

Discrete phenotype variation

Answer 3

alternative forms
ex social insects such as bees and ants
larvae hatch with almost identical genetic material but they have queens and workers

Question 4

continuous phenotype variation

Answer 4

1 genotype can result in many phenotypes
ex Daphnia pigmentation to varying radiation
High UV = high pigmentation
High predator abundance = low pigmentation to blend in

Question 5

Reaction norm

Answer 5

relationship between response of a continuously varying trait and environmental conditions

Question 6

Conditions for Hardy-Weinburg equilibrium

Answer 6

No mutation
No migration
large population size
random mating 
No selection