Question

20 POINTS - MONOHYBRID CROSS

Complete the following monohybrid cross.
Two parents that are heterozygous for brown eyes.

Be sure to identify the genotypes of the parents, complete the Punnett square, identify the phenotypes with genotypes and the ratio of the phenotypes.

What percent of the offspring have blue eyes?

Answer 1

to make it easier, 75% would have blue eyes

Answer 2

both parents' genotypes are Bb (brown blue)
the punnet square would be
BB(kid one) Bb(kid two) Bb(kid three) bb(kid four)
kid one will be homozygous for brown eyes. kid two and three will be heterozygous for brown eyes. kid four will be homozygous for blue eyes

in other words, 75% will have brown eyes. 25% will have blue eyes