Question

A geneticist crossed pure breeding black mice (BB) with pure breeding brown mice (bb). All the mice in the F1 (first) generation had black coats. When these mice were crossed, they yielded 961 black-coated mice, and 317 brown-coated mice. The Punnett square below describes this cross. The numbers 1 to 4 are shown instead of the genotypes for the offspring.

Which of the genotypes, if any, is MOST likely to occur in the second generation that is shown in the Punnett square above? (2 points)

Group of answer choices

Bb

Answer 1

1. BB

2. Bb

3. Bb

4. bb

Here you are!

Answer 2

The Punnet square that shows each of the boxes is shown in the image attached.

What is the Punnet square?

When it comes to forecasting the inheritance of traits governed by basic Mendelian genetics—in which alleles obey the laws of dominance, recessiveness, and segregation—the Punnett square is especially helpful. The patterns that emerge in the squares offer information about the likelihood that the offspring will have distinct genotypes.

In genetics, a Punnett square is a graphical representation that is used to forecast the genotype distribution of an offspring and the possible results of a genetic cross between two individuals.