In a plant, the allele for tall stems (T) is completely dominant to the allele for short stems (t). A second gene located on a separate chromosome determines flower color. The allele for purple flowers (E) is completely dominant to the allele for white flowers (e). A tall plant with white flowers is crossed with a tall plant whose flower color is unknown. The resulting F1 offspring population showed the following phenotype frequencies: Phenotype Frequency Tall stems, purple flowers 3/8 Tall stems, white flowers 3/8 Short stems, purple flowers 1/8 Short stems, white flowers 1/8 What are the genotypes of both parent plants?

Question

Haiden Camacho

Biology

11 November, 14:51

In a plant, the allele for tall stems (T) is completely dominant to the allele for short stems (t). A second gene located on a separate chromosome determines flower color. The allele for purple flowers (E) is completely dominant to the allele for white flowers (e). A tall plant with white flowers is crossed with a tall plant whose flower color is unknown. The resulting F1 offspring population showed the following phenotype frequencies: Phenotype Frequency Tall stems, purple flowers 3/8 Tall stems, white flowers 3/8 Short stems, purple flowers 1/8 Short stems, white flowers 1/8 What are the genotypes of both parent plants?

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Answers (1)

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Leroy Cole · Answer 1

Genotype of parents is TtEe and TtEe

Explanation:

Given -

Allele for tall stem is "T" and allele for short stem is "t"

Trait of tall stem is dominant over trait of short stem

Also given allele for purple color is represented by "E" and allele for white flower is "e"

Trait of purple color is dominant over trait of white color

Genotype of Tall stems, purple flowers - TtEe or TTEE

Genotype of Tall stems, white flowers - Ttee or TTee

Genotype of Short stems, purple flowers - ttEe or ttEE

Genotype of Short stems, white flowers - ttee

This makes it clear the genotype of parents would be

TtEe and TtEe