Zygote

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=__Definition:toc__= Cell that results from the union of a sperm and an ovum. Gen Psych, Ch 8, pp. 252

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During the early stages of reproduction, a sperm fertilizing an egg. What is formed when these two are joined is a zygote. At conception, the 23 chromosomes from the sperm join with 23 chromosomes from the ovum to make up the set of 46 that will be reproduced in each cell of a person. media type="custom" key="23448614"

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Sperm is to zygote like shoes are to women. Sperm and egg is to zygote as flour and water is to a biscuit.

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=__In the News__:= Fertility treatment: Zygote intrafallopian transfer Considered the most invasive of all [|fertility treatments], zygote intrafallopian transfer (ZIFT) is the choice of less than one percent of people who turn to [|assisted reproductive technology (ART)]. Still, the method can work well for some couples — about 240 ZIFT babies are born each year in the United States.

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