Chemistry NEET Full Syllabus Mock Test 180 Question New Syllabus Mock Test - 10 PCB Single Correct MCQ
Published on: August 13, 2026

In a monohybrid cross, a plant with red flowers and a plant with white flowers are crossed. Considering codominance, if the generation is self-pollinated, what is the expected genotypic ratio in ?

A
B

C
D

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The correct answer is:
A

In codominance, both alleles express themselves independently when present together. Thus, heterozygote shows both red and white colour simultaneously (not blending).
Parent plants: RR (red) × rr (white)
Gametes: and
generation: (red + white, codominant expression)
Selfing

Genotypes in
Red only
Red + White (codominant expression)
r → White only
Genotypic ratio

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