David is African-American and Cynthia is European-American and they were both born on the same day. At birth their telomeres would be the same length and now they are older adults, so Cynthia's telomeres would be longer than David's.
A telomere (pronounced "end" and "part" in Greek), located at the ends of linear chromosomes, is a region of repeating nucleotide sequences linked to specialized proteins. Even though they can have various architectural forms, telomeres are a prevalent genetic trait that is most frequently found in eukaryotes.
They safeguard the integrity of linear chromosomes by preventing DNA repair systems from misinterpreting the very ends of the DNA strand as a double-strand break, and they protect the terminal sections of chromosomal DNA from progressive degradation in the majority, if not all, organisms bearing them.
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