Question

Which of the following is true about alleles?

A) two alleles of the same gene will be found at different locations on the same chromosome
B) two alleles of the same gene will have one or more differences in DNA sequence
C) two alleles of the same gene will be found on different (non-homologous) chromosomes
D) after mitosis, the two daughter cells will have different alleles
E) all of the above are true

Answer 1

Option B is true: alleles are different versions of the same gene that vary in DNA sequence. The correct option is B) two alleles of the same gene will have one or more differences in DNA sequence

Step-by-step explanation:

Among the given options regarding alleles, the true statement is B) two alleles of the same gene will have one or more differences in DNA sequence. Alleles are different versions of the same gene, and even slight variations in their DNA sequences can result in different traits.

For example, the human blood type is determined by the alleles for A, B, and O blood type genes. Individuals can be homozygous (e.g., AA, BB, OO) with identical alleles on each homologous chromosome, or heterozygous (e.g., AB, AO, BO) with different alleles. After mitosis, the two daughter cells will have the same alleles as the parent cell. The correct option is B) two alleles of the same gene will have one or more differences in DNA sequence