We're taught that chromosomes define biological sex: xx = female, and xy = male. However, it's not quite that straightforward. Hank Green hosts as we explain how science proves that biological sex is ...

Whenever we inform parents, it is “genetic”, very first reaction of parents who have a child with genetic disorder is — how this happened? We have no family history. While it is true that heredity ...

Prof Rajesh Khadgawat, a senior endocrinologist at AIIMS, said transgender identity should not be confused with disorders of sexual development (DSD), a separate medical condition affecting genital ...

One of the most detailed 3D maps of how the human chromosomes are organized and folded within a cell's nucleus is published in Nature. Chromosomes are thread-like structures that carry a cell's ...

Doctors discovered a woman had "blood chimerism" after examining the chromosomes of cells from different parts of her body. When you purchase through links on our site, we may earn an affiliate ...

Here’s a quick reality check: ice cream sales go up in summer, and so do drownings. But no one thinks Ben & Jerry's is a silent killer. It’s correlation, not causation. Yet this same logical ...

Human egg cells are often prone to chromosomal errors. As women age, the error rate increases sharply — and can contribute to infertility, pregnancy loss, and ...

Add Yahoo as a preferred source to see more of our stories on Google. Iowa State University agronomy professor Kan Wang has spent her career studying Agrobacterium. (Photo by Brooklyn Draisey/Iowa ...

Agrobacterium tumefaciens magnified 15,000 times in an image captured earlier this year with a scanning electron microscope at Iowa State University's Roy J. Carver High Resolution Microscopy Facility ...

Women tend to live longer than men. There are traditional explanations: Men smoke more. They drink more. They tend to engage in riskier behavior. But the fact that this lifespan gap holds true ...

Neil Hunter, a professor in the Department of Microbiology and Molecular Genetics, has discovered a crucial step in how chromosomes stay connected during the development for egg cells and sperm, ...

In about one out of every 800 people, two chromosomes fuse together to form an unusual bond. These are known as Robertsonian chromosomes. It's a mystery that has long stumped scientists. Now, ...