In a plant in which fuzzy leaves (F) are dominant over smooth leaves (f), which of the following crosses

In a plant in which fuzzy leaves (F) are dominant over smooth leaves (f), which of the following crosses will produce only offspring with smooth leaves?

A.
FF x FF

B.
Ff x Ff

C.
ff x ff

D.
Ff x ff.

The correct answer is:

C. ff x ff

Explanation:

In genetics, the letter F represents the dominant allele for fuzzy leaves, and f represents the recessive allele for smooth leaves. To produce only offspring with smooth leaves, both parents must carry only the recessive allele, f.

Here’s why:

• FF x FF: All offspring will have the genotype FF, resulting in all fuzzy leaves because F is dominant.
• Ff x Ff: This cross will produce a mix of genotypes (FF, Ff, and ff), so the offspring will include both fuzzy and smooth leaves.
• ff x ff: Both parents are homozygous recessive, so all offspring will be ff and will have smooth leaves.
• Ff x ff: This cross will produce both Ff (fuzzy) and ff (smooth) offspring.

Therefore, the cross that produces only offspring with smooth leaves is ff x ff, as both parents are homozygous recessive and can only pass on the recessive allele f.