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How gynandromorphs are born at all still remains a mystery.

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Understanding why females fare worse could help explain and treat M.

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Most people have 46 chromosomes, with 23 inherited from each parent.

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A few chromosomes can come with an extra copy, including chromosomes 13, 18 and 21 — which is commonly called Down syndrome.

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It was believed that the sex of a bird was determined by a protein made by the DMRT1 gene, which would reach all jpg index of breasts cells of the bird through the bloodstream, Dr.

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During embryonic and larval development, how do cells know where to stop and where to go?

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Arnold said his own research on sex genes has implications for treating a variety of human diseases that seem to vary by gender.

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A few chromosomes can come with an extra copy, including chromosomes 13, 18 and 21 — which is commonly called Down syndrome.



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The same process is very unlikely to happen in mammals, he said.



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The latest sensation was a half-red, half-taupe cardinal that became a regular visitor in the backyard of Shirley and Jeffrey Caldwell in Erie, Pa.