Two plants of Antirrhinum with pink flowers were hybridized. The F1 plants produced red, pink, and white flowers in a ratio of one red, two pink, and one white flower per plant. What genotype do you think the two plants selected for hybridization have? R allele is for red colour and r allele is for white.
A
RR
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B
rr
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C
Rr
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D
None of the above
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Solution
The correct option is C
Rr
The diagram showing a cross between pink-colored flowers of Antirrhinum.
The correct option is C.
Explanation for the correct option:
The Rr is the genotype of pink flowers.
When Rr and Rr are crossed one red, two pink, and one white-coloured flower are obtained.
Explanation for the incorrect options:
Option A
RR is the genotype of the red flower.
When two red-coloured flowers will be crossed only red-coloured flowers will be obtained.
Option B
rr is the genotype of the white flower.
When two white flowers will be crossed only white flowers will be obtained.
