In Antirrhinum two plants with pink flowers were hybridized. The F₁ plants produced red, pink and white flowers in the proportion of 1 red, 2 pink and 1 white. What could be the genotype of the two plants used for hybridization? Red flower colour is determined by RR, and white by rr genes.

Question

Dr. Abubacker · Accepted Answer

[Solution from source] Flower colour in Antirrhinum (dog flower) shows incomplete dominance, so the heterozygote Rr is pink. Crossing Rr × Rr gives RR : Rr : rr in a 1 : 2 : 1 ratio, i.e. red : pink : white. RR or rr parents would breed true for red or white. Answer (3).

Q. In Antirrhinum two plants with pink flowers were hybridized. The F₁ plants produced red, pink and white flowers in the proportion of 1 red, 2 pink and 1 white. What could be the genotype of the two plants used for hybridization? Red flower colour is determined by RR, and white by rr genes.

Explanation

Reviewed by Dr. Abubacker

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