If two pea plants having red (dominant) coloured flowers with unknown genotypes are crossed, 75% of the flowers are red and 25% are white. The genotypic constitution of the parents having red coloured flowers will be:

Options

A. Both homoxygous
B. One homoxygous and other heterozygous
C. Both heterozygous
D. Both hermizygous

Answer

C

Explanation

When both heteroxygous red coloured (dominant) flowere plants are crossed, i.e. Rr x Rr, the progeny produced would be 75% red and 25% white flowered plants.