Question

Complete a cross between two organisms that are both heterozygous for Black fur (Bb which is dominant over white fur). Use a Punnett square to evaluate the possible genotypes. (1) List all the genotypes from your Punnett Square for the offspring. (2) Determine & list the phenotypes that can be produced in the offspring. (3) Determine the probability of producing offspring with the bb genotype. (3 points)

Answer 1

1) 1 BB , 2 Bb, 1 bb
2) 3 organisms with Black fur as it is dominant, 1 organism with white fur (bb) because it is recessive
3) 25 % because there is a 1/4 chance