Question

Part A)i n plants, purple flower color is dominant to white flowers color. You crossed a white flowering plant with a purple flowering plant. Out of 236 plants in the offspring, 114 had white flowers and the other 122 had purple flowers. What were the genotypes of the parent plants?

A. One plant was heterozygous white and the other heterozygous purple

B. Both plants are homozygous

C.Both plants are heterozygous

D. One plant was homozygous white and the other heterozygous purple

E. One plant was heterozygous white and the other homozygous purple

Part B)

In plants, purple flower color is dominant to white flowers color. You crossed a white flowering plant with a purple flowering plant. Out of 236 plants in the offspring, 114 had white flowers and the other 122 had purple fowers. What were the genotypes of the parent plants?

A. Both plants are homozygous

B. Both plants are heterozygous

C. One plant was heterozygous white and the other homozygous purple

D.One plant was heterozygous white and the other heterozygous purple

E. One plant was homozygous white and the other heterozygous purple.

Answer 1

Part A

The answer is - D. One plant was homozygous white and the other heterozygous purple.

Part B

Same question but here option -E  One plant was homozygous white and the other heterozygous purple will be the correct answer.

Now we are crossing White flower and purple flower,where purple is dominant over white.

So white flower is homozygous recessive.

Now out of 236

114- white and 122 purple.

If we look into the ratio white:purple is almost 1:1.

So purple must be in heterozygous condition.

let us take A- for purple and a- white

cross would be- white X purple

( aa ) ( Aa)

we will get 2 types Aa and aa in 1 :1 ratio.

If purple is in homozygous condition the ratio would have been purple:white= 3 :1.