1 / 17

Reproduction of Cells

Learn the differences between asexual (binary fission, fragmentation, budding, parthenogenesis) and sexual reproduction (meiosis, genetic variation) in cells. Explore gametes, meiosis stages, genetic variation mechanisms, and the development of gametes in both genders. Discover the fascinating world of cellular genetics!

daryll
Download Presentation

Reproduction of Cells

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Reproduction of Cells Asexual Vs Sexual Reproduction

  2. Asexual Reproduction • Single parent passes complete copy of genetic information to its offspring • Identical to parent • 4 types • Binary fission • Fragmentation • Budding • Parthenogenesis

  3. Binary Fission • DNA duplicates -> Cell grows -> Cell splits

  4. Fragmentation • Body breaks into several pieces and grow new parts or whole organism

  5. Budding • New individuals split off from existing ones

  6. Parthenogensis • Female makes viable egg that grows into an adult without being fertilized by male

  7. Sexual Reproduction • Genetic material given to offspring by two individuals • Offspring are genetically different from parents • Gametes • Reproductive cell (sperm or egg) • Division of germ cell • Haploid cells created through meiosis • Union produces zygote

  8. Meiosis • Cell reduces chromosome number in new cells to half the number of the original cell • Sperm and egg (1n each, haploid) • Combine result in zygote (2n, diploid)

  9. Meiosis • Interphase • Begins with duplicate set of chromosomes like mitosis • Two divisions results in four (1n, haploid) cells • Meiosis I and Meiosis II

  10. Meiosis I • Prophase • Chromosomes condense • Spindle fibers form • Homologous chromosomes line up next to each other (synapsis) • Tetrads align side by side • Twist around each other • Portion breaks off to the adjacent chromatid • Crossing – over results in new mix of genetic information

  11. Meiosis I • Similar to mitosis • Metaphase I • Anaphase I • Independent assortment • Telophase I • Results in two cells with a chromosome from each pair of homologous chromosomes

  12. Meiosis II • Prophase II, no duplication of chromosomes • Metaphase II • Anaphase II • Chromatids separate • Telophase II • Cytokinesis II • 4 new genetically different haploid cells

  13. Genetic Variation • Crossing – over • Independent assortment • Random fertilization

  14. Development of Gametes • Testes in males • Spermatogenesis to create sperm • Ovaries in females • Oogenesis to create ova • 1 egg and 3 polar bodies

  15. Karyote

More Related