Talk:Sylvia/@comment-2001:8003:1AF5:1C00:E0E1:6421:F167:3746-20170723010500

Chimera is a composite, in real life individuals (humans) that are refered to as chimera have multiple DNA (typically 2), so the classification of "male" might be an oversimplification. Sylvia is probably just a case of a female-male chimera, possibly a true hermaphrodite.

All the examples I know of have a female dominate DNA, with either a female or male DNA additional - the ones with the extra male DNA are easier to detect because of the Y chromosone

the article didn't memtion the case of the father demanding a paternity test on his child and finding that the mother that gave birth appeared to fail the maternity test. It was later found that she was a female-female chimera (her reproduction tract was basically her absorbed fraternal twin sister)

https://www.scientificamerican.com/article/3-human-chimeras-that-already-exist/

"One way that chimeras can happen naturally in humans is that a fetus can absorb its twin. This can occur with fraternal twins, if one embryo dies very early in pregnancy, and some of its cells are "absorbed" by the other twin. The remaining fetus will have two sets of cells, its own original set, plus the one from its twin."