(1)
In horses black is dependent upon a dominant gene, B, and chestnut upon
its recessive allele, b. The trotting gate is due to a dominant gene T
and the pacing gate to its recessive allele t. If a homozygous black
pacer is crossed to a homozygous chestnut trotter, what will be the.
appearance of the F₁ generation.
(2.
If two F individuals from the preceeding problem were crossed, what
kinds of offspring could they have and in what proportions?
5.
If a F, male from problem 1 were mated to a homozygous female black pacer
what kinds of offspring could be produced and in what proportions?
In rabbits black is due to a dominant gene, B, brown to its recessive
allele, b. Short hair is due to a dominat gene, L. long hair to its re-
cessive allele 1. In a cross between a homozygous black short-haired
male and a honozygous brown long-haired female, what would be the gene-
tic constitution and the appearnace of the F₁ generation? Of the F₂
generation.
IN turkeys a dominant gene, R, produces the familiar bronze color; its
recessive allele, r, results in red. Another dominant, gene, H, results
in normal feathers; its recessive allele, h, produces feather without
webbing, so they resemble tufes of hairs. Eight bronze turkeys with normal
feathers, and one red with hairy feathers, resulted from a cross of two
bronze turkeys with normal feathers. What were the genotypes of the
parents?
Assuming that the red bird with hairy feathers is a female, what kind of
offspring would you expect and in what proportion, if it were mated to
its male parent?