Human Chimeras[1] are even more weirder: one person with cells from two fraternal twins. Causes real problems with maternal[2] and paternal[3] DNA testing. Even more problems[4] if the twins are male and female.
[2] https://wikipedia.org/wiki/Lydia_Fairchild — Fairchild stood accused of fraud by either claiming benefits for other people's children, or taking part in a surrogacy scam, and records of her prior births were put similarly in doubt . . .
[3] https://time.com/4091210/chimera-twins/ — the father had absorbed some of his twin's cells when he was a fetus, effectively becoming a chimera of himself and his brother. The man's previous child's DNA matched his . . .
[1] https://duckduckgo.com/?q=human+chimera
[2] https://wikipedia.org/wiki/Lydia_Fairchild — Fairchild stood accused of fraud by either claiming benefits for other people's children, or taking part in a surrogacy scam, and records of her prior births were put similarly in doubt . . .
[3] https://time.com/4091210/chimera-twins/ — the father had absorbed some of his twin's cells when he was a fetus, effectively becoming a chimera of himself and his brother. The man's previous child's DNA matched his . . .
[4] https://wikipedia.org/wiki/46,XX/46,XY Sex-chromosome discordant chimerism (XX/XY chimerism)