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angellong94
20.03.2020 •
Biology
A cross between a plant with red flowers (R = dominant) and a plant with white flowers (are = recessive) yielded 47 plants with red flowers and 51 plants with white flowers. What are the genotypes of the parent plants
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Ответ:
Red parent: Rr
White parent: rr
Explanation:
Number of red flower plants yielded = 47
Number of white flower plants yielded = 50
Ratio of red to white flower = 1:1 approximately
Let us assume that the genotype of the red parent is heterozygote (Rr), since the white allele is recessive, the genotype of the white parent is definitely rr.
Rr x rr = Rr (red), Rr (red), rr (white), rr (white)
Ratio of red offspring to white offspring = 1:1
Hence, the genotype of the red parent is Rr while that of white parent is rr.
Ответ: