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Illegal Beings: Human Clones
Re: Can You Tell Me?
libfemme ( 05/10/2004, 19:06:36 )Both take donated cells, both start in a petri dish in a lab, and both must be surgically implanted into a female within 5 days in order to develop through a normal pregnancy. However, the difference is in the combination of genes that the offspring gets.Invitro fertilization involves an egg and a sperm and allows them to fertilize, i.e. join together. The egg gives 1 set of genes and the sperm gives another set of genes to the embryo. Together the two sets make a combination of genes that is unique to that individual. In other words, although the genes themselves are copies from the parents, its the particular combination that is unique.Cloning involves a cell that is not an egg or a sperm, but a regular body cell such as a skin cell which already contains 2 sets of genes. It puts those two sets into a hollowed out donor egg cell. (The donor egg contributes no genes, just cytoplasm. In fact it does not even have to be the same species.)The newly formed cell, with the cloned genes inside it, then develops into an individual with the identical genetic combination as the parent with the skin cell.Invitro fertilization is sexual reproduction, that is there are two parents that contribute genetic material equally, and the combination of genes of the offspring is unique. Cloning is asexual reproduction, that is there is only 1 parent providing both sets of genetic materially, therefore the combination of genes is not unique. Genetically the embryo is an identical twin of the parent.
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