200 likes | 339 Views
How Cells Reproduce. Chapter 6. Mitosis, Meiosis, and the Prokaryotes. Eukaryotic cells Mitosis copies DNA and divides a nucleus, producing two identical nuclei Meiosis is a nuclear division that produces haploid gametes for sexual reproduction. A Chromosome and Sister Chromatids.
E N D
How Cells Reproduce Chapter 6
Mitosis, Meiosis, and the Prokaryotes • Eukaryotic cells • Mitosis copies DNA and divides a nucleus, producing two identical nuclei • Meiosis is a nuclear division that produces haploid gametes for sexual reproduction
A Chromosome and Sister Chromatids centromere
Cytoplasmic Division Mechanisms • Cytokinesis
Mitosis and the Chromosome Number • Mitosis produces 2 diploid nuclei with the same # of chromosomes as the parent cell • Chromosome number- # chromosomes in a cell • Human cells _______________ • sex chromosomes XY
The Importance of Timing and Completion of Cell Cycle Events
Characteristics of Cancer Cells • Cancers • Cells grow and divide abnormally • Cells may break away and invade distant tissues (metastasis) benign tumor malignant tumor
Impacts, IssuesHenrietta’s Immortal Cells • Henrietta Lacks died of cancer at age 31, but her cells (HeLa cells) are still growing in laboratories