Two purebred plants are bred The enzyme that controls the ph

Two purebred plants are bred. The enzyme that controls the phenotype that is being studied is measured in the progeny and represented in the graph below. What are the expected ratios of the different progeny based on their enzyme levels?

A.

A: 33.3%, B 33.3%, C 33.3%

B.

A: 25%, B 50%, C 25%

C.

A: 25%, B 25%, C 50%

D.

A: 50%, B 25%, C 25%

Solution

On the basis of enzyme level that control phenotype is measured in progeny and it represnt that progency c phenotype is dominant over progeny a and progeny b has a intermediate characterstics

So, if the intial cross in pure bred is

Aa X Aa

So , the genotype of progeny is Aa, AA, aa

The offspring has 3 phenotype and the phenotypic ratio will be 1:2:1

So, the answer is (b) 25% progeny A , 50%progeny B , 25% progeny C