Question

Sister chromatids of a chromosome have

• A. Different genes at the same locus
• B. Different alleles of the same gene at the same locus
• C. Same alleles of the same gene at the same locus
• D. Same alleles at different loci

Answer 1

Answer: (C)

Same alleles of the same gene at the same locus

The sister chromatids are produced due to the process of replication and are attached to the centromere of the same chromosome. These are the duplicated copies of each other and so they possess the same alleles of the same gene at the same locus.

Thus, the correct answer is option C.