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 ...

Many butterflies develop wing patterns that mimic other species to protect themselves from predators. While growing complex ...