Meiosis It’s all about the Chromosomes

Why do Mitosis and Meiosis? Meiosis makes gametes and plant spores Meiosis only happens in reproductive cells

In the beginning there is Interphase

Draw and label on pg 6

Stages (pg 6) Meiosis I = Prophase I, Metaphase I, Anaphase I and Telophase I Cytokinesis Meiosis II = Prophase II, Metaphase II, Anaphase II and Telophase II

Meiosis I (pg6) Prophase I = DNA forms chromosomes Metaphase I = chromosomes line up in homologous pairs

Count the centromeres Number Chromosomes = number centromere

Meiosis I cont. Anaphase I = homologous chromosomes get pulled apart Telophase I = Nuclear membranes form and cytoplasm divides

Keep 46 Chromosomes in each cell in Meiosis I

Meiosis II Start with 2 daughter cells with 46 chromosomes Prophase II = membrane dissolves Metaphase II = chromosomes line up in middle

Meiosis II cont. Anaphase II = split and move to opposite sides Telophase II = nuclear membrane forms

End Meiosis with 4 daughter cells with 23 chromosomes

Steps of Meiosis

Compare and Contrast Mitosis and Meiosis Venn Diagram pg 7 Compare and Contrast Mitosis and Meiosis