Resulta que los genomas parentales no son equivalentes en el embrión. Ni así pueden chicos (XD no se crean)!:
"A majority of a human tumor called a hydatidiform mole, which resembles placental tissue, have been shown to arise from a haploid sperm fertilizing an egg in which the female pronucleus is absent. After entering an egg, the sperm chromosomes duplicate themselves, thereby restoring the diploid chromosome numbrer. Thus, the entire genome is derived from the sperm. Here we see a situation in which the cells survive, divide, and have a normal chromosome number, but development is abnormal. Insted of forming an embryo, the egg becomes a mass of placenta-like cells. Normal development does not occur when the entire genome comes from the male parent."
"A majority of a human tumor called a hydatidiform mole, which resembles placental tissue, have been shown to arise from a haploid sperm fertilizing an egg in which the female pronucleus is absent. After entering an egg, the sperm chromosomes duplicate themselves, thereby restoring the diploid chromosome numbrer. Thus, the entire genome is derived from the sperm. Here we see a situation in which the cells survive, divide, and have a normal chromosome number, but development is abnormal. Insted of forming an embryo, the egg becomes a mass of placenta-like cells. Normal development does not occur when the entire genome comes from the male parent."
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