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Science: Chapter 19-4
How does fertilization take place?
7
Science
6th Grade
03/03/2008

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Term

What word means:

reproductive cells?

Definition

gametes

 

Each has half the number of chromosomes needed, so that when they join, the zygote will have the correct number of chromosomes.

Term

What word means:

a fertilized egg ?

Definition
zygote
Term

What word means:

joining of one sperm and one egg ?

Definition

fertilization

(fer/til/i/za/tion)

 

It can only occur during ovulation.

Term
Where is the zygote usually formed?
Definition

in the oviduct

Then it travels and enters the uterus.

Term
What are the male reproductive cells called?
Definition
sperm
Term
What are the female reproductive cells called?
Definition
eggs
Term
How many chromosomes does a zygote have?
Definition

46

(23 chromosomes from the sperm and

 23 from the egg)

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