Every new life begins after a genetic shuffle. When organisms make eggs or sperm, maternal and paternal chromosomes pair up and swap pieces of DNA in a process called crossing over. This exchange is ...

Twenty years after the Human Genome Project was declared complete, the Y chromosome has been fully sequenced for the first time. Most people have 22 pairs of chromosomes plus two sex chromosomes – ...

Ewing sarcoma develops due to genetic causes that include changes to a person’s DNA and chromosomes. It more often affects teenagers and young adults, males, and white people. The exact cause of Ewing ...