Sex determination at birth is decided on the chromosomes the baby has. A female has two X chromosomes, whereas a male has one X and one Y chromosome. According to Medline Plus, in every cell, humans ...

Chromosome 6p deletion and ADHD share overlapping white matter abnormalities that may underlie similar neurodevelopmental ...

Pregnancy loss may occur in as many as 25% of all pregnancies. Most of these losses occur in the first trimester, and about half are caused by genetic or chromosomal issues. When pregnancy loss occurs ...

When closely related species mate, their offspring sometimes survive but cannot reproduce. This pattern often affects males first, with hybrid males frequently failing to produce functional sperm even ...

The Y chromosome in primates — including humans — is evolving much more rapidly than the X chromosome, new research on six primate species suggests. For instance, humans and chimpanzees share upwards ...

Researchers developed a new method to predict how cancer cells evolve by gaining or losing whole chromosomes. Chromosome changes create rapid shifts that help tumors grow, adapt and resist treatment.