31. Scientists from Johns Hopkins also grew stem cells from egg cells taken from aborted fetuses. 32. By contrast, a woman's egg cells divide just 24 times, almost all during fetal life. 33. The female gonad, the ovary, produces egg cells . 34. Then Wilmut removed the nucleus, containing the genes, from an egg cell taken from another ewe. 35. If the egg cell was formed without meiosis, it is a full clone of its mother. 36. Sometimes there are mistakes with the copying of DNA that makes the sperm or egg cell . 37. This egg cell is never fertilized by sperm and will never be implanted in a womb. 38. Because spermatia cannot swim, they depend on their environment to carry them to the egg cell . 39. ZZ and WW offspring occur either by terminal fusion or by endomitosis in the egg cell . 40. Under the technology, scientists remove the nucleus from an egg cell , leaving proteins and other nutrients.
