A Moment of Science
In mammals, the sex of a baby is determined by the chromosomes it inherits from its parents. But, the combination an animal inherits can be quite different.
According to a study, the longer it takes a woman to get pregnant, the greater her chances of having a boy.
What are the odds of giving birth to a boy? Learn more on this Moment of Science.
Genghis Khan is one of the greatest conquerors who ever lived. Learn about his long lasting "genetic empire" that's still going strong today.
In the case of the African stalk-eyed fly, where the males are like hammer head sharks with their eyes extended on long stalks, sometimes measuring one and half times the length of their bodies, long stalks are an indicator of better genes.
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