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Biology
Genetics
Chromosomes

How many chromosomes does the zygote have Following fertilization?

Answer

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September 13, 2008 8:19PM

Sperm contains 23 chromosomes.

An egg contains 23 chromosomes.

The zygote (a fertilized egg) contains 46 chromosomes.

Yet, it is also important to consider that the egg completes meiosis before joining with the sperm, thereby shedding half of its 46 chromosomes into a polar body that adjoins the zona pelucida lining.