Across the animal kingdom, individuals with identical sex chromosomes—including women with double Xs—live nearly 18% longer than their counterparts with mismatched chromosomes, a new study reveals.
Matching sex chromosomes the secret to a long life? Females in species where they have identical sex chromosomes live 20.9% longer than males & males with matching sex chromosomes have a 7.1% life span Original research
Within mammal species, females live longer than males. Within bird species, males live longer. One factor (but not the only one): which sex is homogametic. Female mammals are XX; male birds are ZZ.
#GreatAdaptations A puzzle explained The secret to a long life? Matching sex chromosomes
Oh. Across the animal kingdom, individuals with identical sex chromosomes—including women with double Xs—live nearly 18% longer than their counterparts with mismatched chromosomes, eg men