HumansModern humans evolved a 'selfish' X chromosome after Africa exodus The chromosome may contain regions that promote their DNA's spread by killing sperm that carry Y chromosomes. However, Y chromosomes may have evolved counter mechanisms over time News
ÎçÒ¹¸£Àû1000¼¯ºÏScientists home in on genetic causes of uncombable hair syndrome Mutations in a gene called PADI3 appear to be the most common cause of a rare condition that makes hair stick out at right angles to the scalp News