Page 84 - Science Course 2 (Book 1)

Mo3-L3b: What are the Phases of Meiosis?

Meiosis involves two divisions of the nucleus, Why is meiosis important?
meiosis I and meiosis II.
Meiosis forms sex cells with the correct haploid
A reproductive cell goes through interphase before number of chromosomes.
beginning meiosis I.
Meiosis also creates genetic variation by
There are four phases of meiosis I. producing haploid cells.
Meiosis I
Telophase I When haploid sex cells join together during fertilization,
& cytokinesis
Metaphase I they make a diploid zygote, or fertilized egg.

Prophase I Anaphase I
Replication

There are four phases of meiosis II.

Meiosis II
Telophase II
Metaphase II & cytokinesis
Cell Division

Cell Division

Prophase II Anaphase II

Key Concept
What are the Phases of Meiosis?

List the phases of meiosis in order

The fertilized egg, formed when sex cells join together,
divides by mitosis to create a diploid organism.

Diploid, 80 chromosomes Diploid, 80 Diploid, 80 chromosomes
chromosomes

Haploid, 40 chromosomes Haploid, 40 chromosomes

Diploid, 80
chromosomes
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