Organic Evolution Test #1 G

Fill in the blank: Selection on Viability occurs when individuals of a particular phenotype ______ to reproductive age at higher rates than individuals with other phenotypes.

• survive

• migrate

• mutate

• compete

Fill in the blank: Selection on Fecundity occurs when individuals with particular phenotypes ______ more offspring during reproduction than individuals with other phenotypes.

• produce

• consume

• eliminate

• ignore

What is the selection coefficient (s)?

• A measure of the strength of natural selection for or against a specific phenotype or genotype

• The number of individuals in a population

• The color of an organism's coat

• The amount of food available in an environment

Fill in the blank: Fitness of one phenotype (dark) = ___.

• 1

• 0.5

• 0

• 2

Fill in the blank: Fitness of the other phenotype (light) = ___.

• 1-s

• s-1

• 1+s

• s

What does s=0 indicate?

• 100% reduction in fitness

• No selection against this allele

• Fitness of dark phenotype is 0

• Fitness of light phenotype is 1

What does s=1 indicate?

• No selection against this allele

• 100% reduction in fitness

• Fitness of dark phenotype is 1

• Fitness of light phenotype is 0

Fill in the blank: According to Hardy-Weinberg Equilibrium, the allele frequencies in a population will not change from one _______ to the next.

• generation

• species

• habitat

• chromosome

• p+q

Based on the diagram, what are the initial allele frequencies for B1 and B2 in the population of mice?

• B1: 0.6, B2: 0.4

• B1: 0.4, B2: 0.6

• B1: 0.5, B2: 0.5

• B1: 0.7, B2: 0.3