When they saw the robin-size songbird’s split coloring, it was immediately clear that the grosbeak was what scientists call a bilateral gynandromorph—an animal that appears half male and half ...

Researchers have uncovered a "selfish" X chromosome in the fruit fly Drosophila testacea that manages to distort inheritance in both sperm and eggs. "But until now, we've only ever seen a ...

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 ...

Increased risk for autism appears to be linked to the Y chromosome, a Geisinger Health System study has found, offering a new explanation for the greater prevalence of autism in males. The results ...

The rare coloration is called bilateral gynandromorphism, Kratter said, and causes the animal to be male on one side of its body and female on the other. For the cardinal, the bright red side and ...

A green honeycreeper spotted on a farm in Colombia exhibits a rare biological phenomenon known as bilateral gynandromorphism ... birds have two different sex chromosomes, designated W and Z ...

This individual is only the second of the species ever recorded exhibiting this trait—called bilateral gynandromorphism ... while males have two Z chromosomes. Gynandromorphism could occur ...

Other bilateral gynandromorph birds have been seen in stable mating pairs, reproducing and behaviorally functioning as both males and females, the study said. These behaviors typically varied with ...

A bilateral gynandromorph is an animal that is born with one male half and one female half. The animal is usually divided down the middle with characteristics of two sexes in one body. Bilateral ...

Move over, Bowie – there’s a new bilateral gynandromorph in town. In a Colombian forest, zoologists have captured footage of an extremely rare and vividly colored half-green, half-female ...

Jenny Graves receives funding from the Australian Research Council. The Y chromosome is a never-ending source of fascination (particularly to men) because it bears genes that determine maleness ...

Until now, the Y chromosome portion of the human genome has contained large gaps which made it difficult to understand variation and associated disease. The structure of the Y chromosome has been ...