Name _____________________________ Period ____

Meiosis

1. Starts with ___________________ chromosomes
2. Involves _____ divisions of the nucleus
3. Divisions called: ___________________ and _________________
4. Each meiosis, I and II are divided into ________ phases of prophase, metaphase, anaphase and telophase.
5. Result is that ___________ ______________ cells are formed.

Meiosis

Stages in meiosis:

à Meiosis I – prophase I, metaphase I, anaphase I, telophase I

à Meiosis II – prophase II, metaphase II. , metaphase II, telophase II

Crossing-over

Crossing-over results in the _______________ of genetic material between _______________ ________________. Thus, increasing the genetic variation in the offspring or babies.

Independent Assortment

The ___________ ___________________ of chromosomes during meiosis results in millions of different gametes.

The independent assortment produces millions upon millions of possible combinations of ______________ for fertilization between egg and sperm.

Independent Assortment

1. Twenty-three pairs of chromosomes separate ___________________.
2. Thus, out of these 23 pairs of chromosomes over 8,000,000 different gametes, with _____________ _____________ ______________, can be formed.

Complete the Venn Diagram of Mitosis and Meiosis.

Mitosis versus Meiosis

1. Mitosis produces ___________ cells

2. Meiosis produces ___________ cells

3. Mitosis produces two cells with the ______ ________ (DNA) material

4. Meiosis produces four cells with _____________ ___________ material