The zygote is the cell resulting from the fertilization. It contains 46 chromosomes, half of which are contributed by an ovum and the other half by a sperm cell. Some 24 hours after fertilization, the zygote divides into two identical cells, which will continue to divide for 3 to 4 days before migrating towards the uterine cavity. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / QA International |
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