Question

Which term describes a type of trait that is usually expressed only when an organism has two identical alleles for the trait?

A- homozygous

B- dominant

C- heterozygous

D- recessive

My guess is D.

Please help!

Answer 1

I agree with your choice.

Answer 2

Thank you!

Answer 3

[AI-generated answer — Explain Bot]

The term that describes a type of trait that is usually expressed only when an organism has two identical alleles for the trait is "recessive."

One way to approach this question is to understand the difference between homozygous and heterozygous alleles. Homozygous refers to having two identical alleles for a particular trait, whereas heterozygous refers to having two different alleles for a particular trait.

In this case, a recessive trait is usually not expressed when an organism has a heterozygous genotype because the dominant allele will mask the expression of the recessive trait. However, the recessive trait will only be expressed if the organism has two identical alleles for it, which is known as being homozygous recessive.

Therefore, the correct answer is D- recessive.