The date for the first domestication of plants in ancient America has been moved back by several thousand years. New radiocarbon dating of squash seeds found in a Mexican cave once occupied by pre-Columbian humans in Guila Naquitz indicate that they are 10,000 years old. It was generally accepted that humans first tamed dogs about 14,000 years ago. However, new controversial evidence based on genetic analysis of material in wolf and dog breeds suggest that humans domesticated wolves as far back as 135,000 years ago and that modern dogs are the evolutionary descendants of these ancestral wolves. Like Father, Like Daughter Some scientists now think that girls get their woman's intuition and adept social skills from their father's genes whereas boys inherit their social ineptitude from their mothers.
Boys only get one X chromosome from their mother and one Y from their father.
Girls receive two X chromosomes, one from each parent. Researchers studying Turner's syndrome, a genetic disorder, found that those women who only get a single X chromosome from their mother as opposed to those who only received a single X from their father, tend to have more problems in social interactions. Inc. All Rights Reserved.