Females have two X chromosomes (XX). Males have one X and one Y chromosome (XY). All eggs contain one X chromosome. Half of sperm contain one X chromosome and half contain one Y chromosome.

An international team of researchers co-led by Job Dekker, Ph.D., at UMass Chan Medical School, have identified rules that ...

Human cells have a complex DNA repair system involving over 500 crucial genes. By analyzing interactions among these genes, researchers identified new potential targets for cancer therapy.

The DNA expert at the center of the Gilgo Beach serial killer case has helped solve several notorious murders - and cracked a mystery at the heart of the infamous Zodiac killer case, a court heard ...

This competition, or arms race, is typically hard to observe–except when the genes in question live on the X and Y chromosomes, which determine the sex of offspring in mammals. In mice, this arms race ...

Track and field is set to become the first Olympic sport to require participants in women’s events to undergo DNA testing to prove ... born with atypical sex chromosomes. World Athletics ...

A DNA expert has laid out the critical evidence that threatens to make or break the case against the Gilgo Beach serial killer suspect. Rex Heuermann, a 61-year-old architect, returned to a ...

In August, a manufacturer of DNA testing kits sent a letter to the Los Angeles County Sheriff’s Department warning officials to stop using certain test kits that had proved prone to giving ...

Heuermann is expected back in court Friday as his lawyers ask a judge to disqualify some of the DNA evidence pertaining to nuclear DNA results obtained from hairs recovered from six victims ...