Science for all ages

The word "biology" comes from the Greek "bio" and "logos" meaning discourse on life. We believe that this discourse can be clearly explained and understood. So... If you do not understand the following material. If something you read here keeps bothering or puzzling you. If you have suggestions on what we should put in this page....
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Cloning by nuclear transfer

First, you need an oocyte ("egg") after it has been fertilized by a spermatozoan (male sexual cell or gamete produced by the testis) but before the genetic material (DNA) of those two gametes has begun to fuse...In this case, the donor embryo is composed of 3 cells so 3 recipient cytoplasms will be required.