Question

Chance or probability is the basis of genetic inheritance. In this Punnett square, you can see the possible alleles for the fur color of mice.

Bb x Bb
B b
B BB Bb
b Bb bb
B- allele for black hair
b- allele for white hair
B is the allele for black, and b is the allele for white. If a rat has black fur, the pair of alleles the rat possesses must be BB or Bb. If a rat has fur that is white, it must have the allele combination bb.

Fill in the chart based on the information in the Punnett square.
Out of 4 offspring, fraction that should be black Percent of offspring that will most likely be white. Probability that a baby mouse will be white Ratio of black mice to white mice.

Answer 1

Out of 4 offspring, fraction that should be black: 3/4

Percent of offspring that will most likely be white: 25%

Probability that a baby mouse will be white: 1/4 (25%)

Ratio of black mice to white mice: 3:1