Question

question 5 of 10
in what way are two alleles for the same gene different?

a. they have small variations in their sequences of nitrogenous bases.

b. they are found at different locations on a chromosome

c. they are found on complementary strands of dna.

d. they contain completely different molecules of dna.

Explanation:

Alleles are variants of the same gene, so they occupy the same locus (location) on homologous chromosomes, not different locations on one chromosome or complementary strands. They are still DNA molecules for the same gene, so they are not completely different; instead, they differ by small changes in the nitrogenous base sequence that lead to different traits.

Answer:

A. They have small variations in their sequences of nitrogenous bases.