a chimera ordinary person or animal except of parts came twin or mother. chimera may arise either monozygotic twin fetuses (where impossible detect), or dizygotic fetuses, can identified chromosomal comparisons various parts of body. number of cells derived each fetus can vary 1 part of body another, , leads characteristic mosaicism skin coloration in human chimeras. chimera may intersex, composed of cells male twin , female twin. in 1 case dna tests determined woman, mystifyingly, not mother of 2 of 3 children; found chimera, , 2 children conceived eggs derived cells of mother s twin.
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