更多parthenogenetic例句

1. Because mammals, including human beings, require certain genes to come from sperm, mammals are incapable of parthenogenesis.
2. Limnadia (Brongniart, 1820) is supposed to consist of species exclusively parthenogenetic.
3. How the males are formed—for of course males are eventually produced by the parthenogenetic females—we do not know.
4. Bancroft and the writer tried to determine the sex of a parthenogenetic tadpole and of a frog just carried through metamorphosis.
5. The writer has recently examined the gonads of a ten months old parthenogenetic frog.
6. He has at present seven parthenogenetic frogs over a year old, produced by merely puncturing the eggs with a fine needle (Fig. 6).