1 / 12

MEIOSIS

MEIOSIS. REDUCTION DIVISION. MEIOSIS – POINTS TO REMEMBER. OCCURS ONLY IN THE GAMETES PRODUCES 4 HAPLOID CELLS WHICH ARE NOT GENETICALLY IDENTICAL TO EACH OTHER OCCURS IN TWO PHASES (I & II) (WHERE DOES MITOSIS OCCUR?) (WHAT DOES MITOSIS PRODUCE?). MEIOSIS.

amina
Download Presentation

MEIOSIS

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. MEIOSIS REDUCTION DIVISION

  2. MEIOSIS – POINTS TO REMEMBER • OCCURS ONLY IN THE GAMETES • PRODUCES 4 HAPLOID CELLS WHICH ARE NOT GENETICALLY IDENTICAL TO EACH OTHER • OCCURS IN TWO PHASES (I & II) • (WHERE DOES MITOSIS OCCUR?) • (WHAT DOES MITOSIS PRODUCE?)

  3. MEIOSIS • MEIOSIS IS THE PROCESS OF REDUCTION DIVISION IN WHICH THE NUMBER OF CHROMOSOMES IN EACH CELL IS CUT IN HALF THROUGH THE SEPARATION OF HOMOLOGOUS CHROMOSOMES.

  4. WHAT IS A HOMOLOGOUS CHROMOSOME? • A pair of chromosomes, one inherited from each parent, that have corresponding gene sequences and that pair during meiosis.

  5. MEIOSIS SUMMARY

  6. MEIOSIS TERMS • TETRAD – STRUCTURE CONSISTING OF 4 CHROMATIDS; FORMED WHEN EACH CHROMOSOME PAIRS WITH ITS CORRESPONDING HOMOLOGOUS CHROMOSOME • CROSSING OVER – HOMOLOGOUS CHROMOSOMES EXCHANGE PORTIONS OF THEIR CHROMATIDS; RESULTS IN THE EXCHANGE OF ALLELES BETWEEN HOMOLOGOUS CHROMOSOMES, PRODUCING NEW COMBINATIONS OF ALLELES (GENETIC VARIABILITY)

  7. TETRAD

  8. CROSSING OVER

  9. OOGENESIS • THE PRODUCTION OF EGG CELLS;

  10. OOGENESIS

  11. SPERMATOGENESIS • THE PRODUCTION OF SPERM CELLS;

  12. SPERMATOGENESIS

More Related