Question

A breeder wants to set up a program to produce zebrafish with long fins. Having long fins is a dominant trait compared to the short-finned wild type. Before she can market her zebrafish, she needs to perform a test cross on the long-finned fish she plans to use as a breeder. How can she tell whether her fish are homozygous or heterozygous for the long-finned trait?

Answer 1

Answer:

Continuous long-finned offspring from several cross test

Explanation:

She must severally test cross betweethe long-finned fish and the short-finned fish; if the offspring are always long-finned, the long-finned parent could probably be homozygous