Study finds chromosomes offer clue to longer life of different sexes in different species
From humans to black-tailed prairie dogs, female mammals often outlive males – but for birds, the reverse is true.
Now researchers say they have cracked the mystery, revealing that having two copies of the same sex chromosome is associated with having a longer lifespan, suggesting the second copy offers a protective effect.
Continue reading...from The Guardian https://ift.tt/2wqScRM
