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16 h 15 m, 15 mar 2002 año - Fertilization

Descripción:

The zygote forms when the sperm and egg come together in one of the fallopian tubes. The newly-formed zygote gets 23 chromosomes from each parent, so has 46 in total. The different chromosomes will determine different traits the baby has. This ranges from their sex to how they physically appear.

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Josephine - Growth and Development

ByJosphine
8 dic 2017
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439

fecha:

16 h 15 m, 15 mar 2002 año
Ahora mismo
~ 23 years ago

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