A dominant-acting allele (B) in cardinals makes males susceptible to parasites t

Question

A dominant-acting allele (B) in cardinals makes males susceptible to parasites that cause the birds to lose all their head feathers. Female cardinals prefer to mate with non-bald males, so that the relative fitness of non-bald males is 1.0 while that of bald males is 0.75. A. (1 pt) What model of selection is acting at this locus? B. (1 pt) What is the relative fitness of heterozygous (Bb) males? C. (1 pt) What is the strength of selection (s) against the bald males? D. (1 pt) A population has allele frequencies f(B)-0.5 and f(b) - 0.5. What is the average fitness of this population?

Explanation / Answer

A. Model of selection acting at this locus is Sexual selection.

B.Relative fitness of Heterozygous male (Bb)= 1+0.75= 1.75/2= 0.875

C.Strength of Selection (s) against Bald Males is higher,as relative fitness of Non Bald males is higher.

D. Average fitness of this population is 0.5

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