Early on, researchers suspected that Dolly was physically older than her chronological age because of the results from a study of her
A)telomeres.
B)blood.
C)egg cells.
D)brain tissue.
E)teeth.

Question

Quizplus · Accepted Answer

Telomeres are the protective caps on the ends of DNA strands that shorten with each cell division and are often used as a marker of cellular aging. Researchers found that Dolly's telomeres were shorter than what would be expected for a sheep of her chronological age, which suggested that she may have been "biologically" older than her actual age.

Early On, Researchers Suspected That Dolly Was Physically Older Than