Question

Yellow colour is dominant over green colour. In a generation of 50% yellow and 50% green individuals, the parents are

• A. Both homozygous
• B. Both heterozygous
• C. One of them is heterozygous
• D. None of the above

Answer 1

Answer: (C)

One of them is heterozygous

A plant with yellow colour is crossed to green colour plant. In the next generation 50% progeny are yellow and 50% are green. So, the genotypes of yellow colour plant is heterozygous(Yy)and green colour plant is homozygous recessive (yy). This cross is called Test cross.

So, the correct option is ‘one of them is heterozygous’.