Question

Tomato plants usually have hairy stems. Hairless stems are present in tomato plants that are homozygous recessive for this trait. If the stem characteristics are determined by a single gene, what is the expected outcome of crossing two tomato plants that are heterozygous for hairy stems?

Answers:

A:75% hairy stems 25 hairless stems
B:100% hairy stems
C: 100% hairless stems
D:50% hairy stems 50% hairless stems

Answer 1

A is the correct answer

Answer 2

Recessive genes are present on the genes but get hindered in the presence of the dominant allele. The dominant allele is the traits that are visible in the phenotype of the offspring.

The correct answer is:

Option A: 75% hairy stems 25% hairless stems.

This can be explained as:

• Hairy stem is a purebred dominant trait = HH

• Hairless is a purebred recessive trait = hh

The cross between the heterozygous hairy stems is shown in the attached image below:

From the cross, we can conclude that 75% of the offspring will have hairy stems while 25% of offspring will have a hairless stem.

Therefore, the heterozygous cross will result in 75% hairy stems 25% hairless stems.

To learn more about purebred and heterozygous follow the link:

https://brainly.com/question/3775014