Mouse Genetics

Which of the following is true about the genotype of the mouse shown below?

• The mouse must be FF.

• The mouse could be FF or Ff.

• The mouse could be ff or Ff.

• The mouse must be ff.

Two black-fur mice are bred, and have the litter shown below. What is the most likely explanation for the presence of the white-fur offspring?

• One of the parents is heterozygous.

• Both of the parents are heterozygous.

• A mutation occurred.

• The parents' fur color has no influence on the offspring fur color.

Two mice with white fur are bred. What will be true of the offspring?

• All of the offspring will be white.

• Three-quarters of the offspring will be white.

• One-half of the offspring will be white.

• There is not enough information given to solve the problem.

A pair of mice are bred several times, generating the following data table. What are the most likely genotypes of the parents?

• FF and ff

• FF and Ff

• Ff and Ff

• Ff and ff

Which of the following is a possible litter for two heterozygous black mice?

• Three black offspring and two white offspring

• Five black offspring

• Four white offspring and one black offspring

• All of the above