Ancestry and human evolution is researched using these differences in Y chromosomes.

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Short tandem repeats (STRs) are sequences of DNA that consists of a short pattern of two to thirteen nucleotides repeated over and over again. The number of times a particular sequence is repeated varies between individuals and populations, making it a useful tool for studying ancestry and evolution. Y chromosome STRs are particularly useful for tracing paternal lineages since the Y chromosome is only passed down from father to son. The other options, single-nucleotide repeats, mutations in DNA coding regions, telomere deletions, and frameshift mutations, may also provide information about ancestry and evolution but are not as commonly used as Y chromosome STRs.

Ancestry and Human Evolution Is Researched Using These Differences in Y