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Appendix 2
The Development of the Unborn Child's Body
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Zygote
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Timing
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Source |
An embryo, or a new human, comes into
existence when a zygote is produced at fertilization
by the combination of a sperm with an ovum.
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At conception |
Moore, p 2 |
| The sperm has 23 chromosomes and so
does the ovum, but the zygote has 46 chromosomes.
Although half of its chromosomes come from each
parent, the zygote is genetically different than
either of them, and is, in fact, genetically unique. |
At fertilization |
Moore, p 37 |
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