True breeding always homozygous dominant

explanation:

the fossil record extends back to a dog-like ancestor some 55 million years ago, which gave rise to the first horse-like species 55 to 42 million years ago in the genus eohippus.

b is the best answer for this question.

answer; i believe the correct answer is (data); /// good luck

if you know your abc's you should be able to get your answer or just use google