While it’s a known fact that female guppies prefer orange and unusual patterns on their male partners, the team found that ...

The birds were given either a vehicle or E2 from hatching ... Each of the 12 modules identified by WGCNA was enriched for genes from at least one chromosome. Of these significant enrichments, those on ...

The Y chromosome can disappear over time in human males, which may introduce a number of health problems. While the exact trigger for such degeneration is unknown, environmental factors can play a ...

The octopus just revealed another one of its secrets: what determines its sex. University of Oregon researchers have identified a sex chromosome in the California two-spot octopus. This chromosome ...

Astonishingly, this cephalopod Z chromosome originated more than 480 million years ago, making it the most ancient animal sex chromosome known. The findings were posted on the preprint server bioRxiv.

These results suggest dosage compensation of sex chromosomes between males and females is a necessity, not just in birds and monotremes but all vertebrate species.

CREDIT: Edward Braun The team also found evidence that this spot on the bird chromosome has suppressed the recombination process since around the time the dinosaurs disappeared.

Braun’s team found evidence that one section of one bird chromosome had suppressed this recombination process for a few million years around the time the dinosaurs disappeared.

Female birds carry both avian sex chromosomes (ZW) while males carry two copies of the same chromosome (ZZ) — the opposite pattern is seen in mammals, with females carrying XX and males carrying XY.

In animals, things get even more complicated. Some rodents don’t have Y chromosomes at all, and both sexes have a single X. For several species of voles, a quarter of females mysteriously have XY ...

Scientists studying zebra finches have found that the length of protective caps on the birds’ chromosomes, known as telomeres, can predict life span when they’re measured early in life.

The male Y chromosome has disappeared from a species of rat, leading scientists to investigate how humans might also lose ours in the near future.