If a plant of genotype A/a is selfed,and numerous offspring are scored,what proportion of the progeny is expected to have homozygous genotypes?
A)0
B)25%
C)50%
D)75%
E)100%

Question

Quizplus · Accepted Answer

When a plant of genotype A/a selfs, it produces gametes with either A or a allele. The possible genotypes of the offspring are AA, Aa, and aa in a 1:2:1 ratio. Half of the offspring that are Aa will have homozygous genotypes, and all of the offspring with AA or aa genotypes will be homozygous. Therefore, the expected proportion of progeny with homozygous genotypes is 50%.

If a Plant of Genotype A/a Is Selfed,and Numerous Offspring