Question

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

• A. be both homozygous
• B. one homozygous and other heterozygous
• C. both heterozygous
• D. both hemizygous

Answer 1

Answer: (C)

both heterozygous

Answer 2

When two pea plants having red (dominant)c coloured flowers with unknown genotype are crossed, the $75\%$ red and $25\%$ white flowered plants will be produced by following the law of Mendel. This is possible only if the parents are heterozygotes.