"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." The 23 rd chromosome base pair contains what are known as our sex chromosomes. For most females, this ...

Genes are segments of DNA (deoxyribonucleic acid) that are located inside every human cell. The DNA inside each cell is tightly coiled in structures called chromosomes. Each chromosome contains a ...

What was once the final frontier of the human genome -- the Y chromosome -- has just been mapped out in its entirety. Scientists used advanced sequencing technologies to read out the full DNA sequence ...

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

Earlier this year, the often overlooked issue of differences in sex development came to the fore after two women boxers were allowed to compete in the Olympics after previously failing a gender ...

Most people are born with 46 chromosomes that are divided into 23 pairs. Chromosome pairs carry genes from each parent, which determine a person’s physical characteristics, like their height or eye ...

The Y chromosome is perhaps the most puzzling part of the human genome. Associated with male development, it is chock-full of repetitive and inverted stretches of DNA, a hurdle that makes it ...

Did you know that your baby’s genetic makeup was determined at conception? From the moment the sperm met the egg, your little one’s genetic code — DNA — began forming. It’s made up of 23 pairs of ...

Abnormalities in the structure of chromosomes within someone’s genetic makeup are called structural chromosomal abnormalities. Robertsonian translocations are very rare structural chromosomal ...

Recent research has spotlighted an intriguing and somewhat concerning trend: the Y chromosome, crucial for determining male sex, is gradually disappearing. This raises questions about the future of ...

A genome sequence for the flatworm Schmidtea mediterranea reveals a chromosome that might be primed to become a sex chromosome. The finding offers a remarkable chance to study the evolution of sex ...