On the planet Hulk, in the Marvel Galaxy, all humanoid forms are green with extr

Question

On the planet Hulk, in the Marvel Galaxy, all humanoid forms are green with extraordinary musculature.

For Hulks, hair texture is determined by a seven quantitative loci. The increaser allele at each locus increases the amount of extremely thick, brittle hair, whereas each locus's null allele (t) codes for extremely fine, straight hair (the "baseline" phenotype).

When a Hulk with completely thick, brittle hair mates with a She-Hulk whose phenotype is extremely fine, straight hair, the expected proportion of offspring with extremely fine, straight hair is:

A. 0.75.

B. 0.25.

C. 0.667

D. 0.50

E. 0.00.

Explanation / Answer

E. 0.00

Let's take TT for completely thick brittle hair

tt for extremely fine straight hair

TT *tt

None of the offspring has tt

So 0.00

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