In his monohybrid crosses for seed color in peas,Mendel reported 6,022 yellow seeds and 2,001 green seeds.How many of each color class were expected?
A)4,011 green and 4,011 yellow
B)All should be green
C)All should be yellow
D)6,017 yellow and 2,006 green
E)2,006 yellow and 6,017 green

Question

Quizplus · Accepted Answer

According to Mendel's laws of segregation and independent assortment, if yellow seed color is dominant (represented by the allele Y) and green seed color is recessive (represented by the allele y), then in a monohybrid cross between two heterozygous parents (Yy), the expected ratio of yellow to green seeds among their offspring is 3:1. This means that out of a total of 8,023 seeds (6,022 yellow + 2,001 green), (3/4)x8,023 = 6,017 seeds should be yellow and (1/4)x8,023 = 2,006 seeds should be green. Therefore, the expected number of yellow and green seeds is 6,017 and 2,006, respectively, which corresponds to choice D.

In His Monohybrid Crosses for Seed Color in Peas,Mendel Reported