Which of the Following Would Contain Genetic Material That Is

Question

Which of the following would contain genetic material that is 100% identical?
A) Homologous chromosomes
B) Sister chromatids
C) X and Y chromosomes
D) All of the answers are identical

Accepted Answer

Sister chromatids are two identical copies of a single replicated chromosome that are held together by a centromere. Therefore, the genetic material is 100% identical. Homologous chromosomes and X and Y chromosomes are not identical as they carry different versions of genes, while sister chromatids carry the exact same genetic material.