Q. If two pea plants having red (dominant) coloured flowers with unknown genotypes are crossed, 75% of the 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
A) Both homozygous
B) One homozygous and other heterozygous
C) Both heterozygous
D) Both hemizygous
Explanation
When two pea plants having red (dominant) 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 heterozygous. [image:5c_image42.jpeg]
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.