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Meiosis. Stages of meiosis презентация
Содержание
- 1. Meiosis. Stages of meiosis
- 2. Meiosis is a kind of cell
- 3. Stages of meiosis Meiosis steps: meiosis I,
- 4. Prophase I Chromosomes comes together in pairs,
- 5. Metaphase I Tetrads line up on the
- 6. Anaphase I Homologous chromosomes separates to opposite poles
- 7. Telophase I Movement of homologous chromosomes continues
- 8. Meiosis II After meiosis I cells immediately begins second division, meiosis II
- 9. Prophase II Same as prophase I
- 10. Metaphase II Chromosomes stay at the equator
- 11. Anaphase II Chromatids moves to poles (Chromosomes split into 2 part)
- 12. Telophase II Nucleus appears Chromosomes starts uncoil
Meiosis is a kind of cell division in which chromosome number is reduced by half. Meiosis produces haploid (n) cells with new combination.
Слайд 2
Meiosis is a kind of cell division in which chromosome number
is reduced by half.
Meiosis produces haploid (n) cells with new combination.
Meiosis produces haploid (n) cells with new combination.
Слайд 3Stages of meiosis
Meiosis steps: meiosis I, cytokinesis (interkinesis), meiosis II, cytokinesis.
Meiosis
I, each of double set of chromosome is replicated to produce complete copy of every genes.
Слайд 4Prophase I
Chromosomes comes together in pairs, each pair called tetrad (complex
of 4 chromatids)
Chromatids of chromosomes cross over and exchange the genetic material.
Nucleus membrane disappears
Centrioles moves to poles
Chromatids of chromosomes cross over and exchange the genetic material.
Nucleus membrane disappears
Centrioles moves to poles
Слайд 5Metaphase I
Tetrads line up on the equatorial plane.
Chromosomes attaches to the
spindle fiber extending from poles (centrioles)
Слайд 7Telophase I
Movement of homologous chromosomes continues
Haploid set of chromosome forms
Cytokinesis
occurs simultaneously.
Слайд 12Telophase II
Nucleus appears
Chromosomes starts uncoil (becomes invisible)
Cytokinesis begins (Dividing of cytoplasm)
