There are two variants of the gene that determines flower position in pea plants

Question

There are two variants of the gene that determines flower position in pea plants, labeled A and T for axial and terminal". A is dominant to T meaning that only one copy of A is required to make the flowers axial, whereas individuals must be of genotype TT to have terminal flowers. In crosses between plants, each parent gives one of their two genes to the offspring with equal probability. Calculate the probability that an offspring plant will have axial flowers in the following cross. (Enter your probability as a fraction.) A plant with terminal flowers is crossed with a plant having axial flowers

Explanation / Answer

Answer:

Since the genotype of the plant having axial flowers is not given, two conditions are possible:

(1) Cross: TT (Terminal) x AA (Axial)

F1: TA (Axial)

So, if the parent axial plant is homozygous dominant, all the offsprings would have axial flowers.

Probability: 1

(2) Cross: TT (Terminal) x AT (Axial)

F1: TA (Axial), TT (Terminal)

So, if the parent axial plant is heterozygous dominant, 50% the offsprings would have axial flowers.

Probability: 1/2

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.