cellular division -cells split to make more cells
DESCRIPTION
Cellular Division -cells split to make more cells. Why do cells divide?. Repair. Growth. To stay small for metabolism. Asexual. Reproduction. Sexual. 1-Interphase Protein Synthesis Replication 2-Mitosis Cell Division. Main Stages of Cell Life Cycle. Mitosis Steps. 5. 1. - PowerPoint PPT PresentationTRANSCRIPT
Mitosis Steps1. Chromosomes coil
up2. Move to the middle3. Sister chromatids
pulled apart4. Cells split into 2
identical body cells5. Chromosomes uncoil
to resume protein synthesis
1
2
3
4
5
Chromosome # by Species1/2 from mom1/2 from dad
Diploid (2N)= full set of chromosomes
Total # is even
How do you get 1/2 from each parent?Meiosis!=
cell division resulting in 4 haploid (1N) gamete cells (egg/sperm)
Sexual Repro by Meiosis increases genetic diversity
= Diploid Zygote (2n)
Haploid egg (1n) + Haploid sperm (1n)
Mitosis vs Meiosis • Two divisions• Homologous
chromosomes line up • Cross over• Homologous pairs split• Second division sister
chromatids split• 4 different (1N)
gametes (egg or sperm)
I
II
Mitosis Meiosis
Diploid (2n)Haploid (1n)
Homologous chromosomes
line up & split
Sister Chromatids
line up & split