In garden peas, tallness (T) is dominant to shortness (t) and axial flowers (A) are dominant to terminal flowers (a). What are the expected genotypes and phenotypes of the offspring if a heterozygous tall, heterozygous axillary plant is crossed with a heterozygous tall, terminal plant?

Question

Biology

Yael Yang

7 July, 16:06

In garden peas, tallness (T) is dominant to shortness (t) and axial flowers (A) are dominant to terminal flowers (a). What are the expected genotypes and phenotypes of the offspring if a heterozygous tall, heterozygous axillary plant is crossed with a heterozygous tall, terminal plant?

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Answers (1)

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Nathaly May · Answer 1

The correct answer is explained below:

Explanation:

According to the question, heterozygous tall, heterozygous axillary plant has the following genotype, TtAa. It produces the following gametes: TA, Ta, tA, ta. The heterozygous tall, terminal plant has the following genotype: Ttaa It produces the following gametes: Ta, ta. Crossing them,

TA Ta tA ta

Ta TTAa TTaa TtAa Ttaa

(Tall, Axillary) (Tall, Terminal) (Tall, Axillary) (Tall, Terminal)

ta TtAa Ttaa ttAa ttaa

(Tall, Axillary) (Tall, Terminal) (Short, Axillary) (Short, Terminal)

The genotypes of the offspring obtained are: TTAa, TTaa, TtAa, Ttaa, ttAa and ttaa respectively. The phenotypes obtained are: Tall, Axillary = 3. Tall, Terminal = 3. Short, Axillary = 1. Short, Terminal = 1.