Download - Cell Division in Gamete Cells
Cell Division in Gamete Cells
MEIOSIS
Variation
If the cell cycle produces only exact copies, then how is their variation (variety, differences) among living things? Why is it that you look different from your parents and different from the other students in the room?
ANSWER: Meiosis and Crossing Over in Homologous Chromosomes
Homologous Chromosomes
Are corresponding chromosomes from the opposite-sex parent
Crossing OverA process occurring during meiosis wherein two
chromosomes pair up and exchange segments of their genetic material.
Ii important because it results in new combinations of genes that are different from either parent, contributing to genetic variation and diversity.
Crossing Over
Meiosis
Similar to mitosis in some ways but different in other ways.
In meiosis there are two different stages called:
Meiosis I Meiosis II
Meiosis I
Meiosis II
Meiosis
Meiosis produces four cells.
4 Haploid Gamete Cells
Meiosis and Egg Cells: OOGENESIS
Meiosis & Sperms Cells: SPERMATOGENESIS
A Comparison
MITOSIS & MEIOSIS
Cell Division
Mitosis Meiosis
Purpose Growth & Repair
Reproduction
Divisions 1 2
Parent Cell Diploid Diploid
Daughter Cells
2 diploids 4 haploids
Cell Type Somatic Gamete