Lecture 5: Genetics Review

Question 1

Define genetic recombination

Answer 1

All possible allele combinations from random mating of any combination of individuals in a population

Question 2

Phenotypic Plasticity is what

Answer 2

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

Question 3

Phenotypic plasticity can be expressed in what two forms

Answer 3

1) Discrete, alternative forms in which two types of larvae hatch with essentially same genetic material but grow up to have different “jobs” like bees
2) Continuous variations in which the phenotype constantly changes where the genotype stays the same

Question 4

Define reaction norm

Answer 4

The relationship between response of a continuously varying trait and environmental condition

Question 5

Define individuals in relation to evolution

Answer 5

Individuals are the UNIT of evolution but do not evolve

Question 6

The population and evolution

Answer 6

effects of evolution can be observed at this level

Question 7

The hard-Weinberg principle states

Answer 7

that the genetic composition (allele frequency) within a population does not change (Evolution does not occur) unless one of the following assumptions are broken

• Mutations
• Migrations
• Small population size
• Selection
• Non-random mating