Question

Ralph wants to breed two of his prize bulldogs. For the dominant alleles, he has selected small ear (E) and a curly tail (T). Linus, the male bulldog, is homozygous dominant for both traits. Lucy, the female, is heterozygous dominant for both traits.
(a) What are Linus's and Lucy's genotypes?
(b) What percent of their pups will have small ears and curly tails?
(c) What percent will have large ears (e) and straight tails (t)?

Answer 1

Answer:

Linus: EE and TT, as male is dominant and homozygous.

Lucy : Ee and Tt, heterozygous.

Explanation:

A.) The genotype of linus :  EE and TT, as is dominant and homozygous.

The genotype of Lucy : Ee and Tt, heterozygous dominant.

B).Half heterozygous (, Ee, Ee) and half homozygous,( EE, EE,). The  triat is dominant, so all the offspring  have small ears. The same rule applies to tails, TT, TT, Tt, Tt, all with a curly tail.

C).  Traits are dominant, so  dominant gene express itself phenotypically, so  there is no dogs have straight tails or large ears.