Mitosis, y miaosis!

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Mitosis
* Nuclear division into 2 descendent nucleus.
* Requests for the cells that are willing to achieve mitosis
1. Chromosomal DNA must be duplicated
2. Protein synthesis that willform the spindle
3. Centriole division power 4. energy supply for successive processes
Objectives:
* Keeping constant the chromosomal number of a specie
* Responsible forgenetics/heredity material
* Guarantee the somatic growth
Phases:
* PHOPHASE
1. Nuclear membrane begins to disappear
2. Chromatin condenses
3. Chromosomes became visible

* METAPHASE1. The chromosomes align in the center of the equator
2. Direction of the same pole

Equatorial
plate

* ANAPHASE
1. Chromosomes move randomly to apposite sides
* TELEPHASE1. Form 2 identical daughter cells.
Diploide
2n

2n

Meiosis sexual process
Special kind of division that happens during the formation of egg and sperm in animals and spores of certainplants
The process consists in a pair of cellular division where the number of chromosomes reduces to half.
Each gamete receives only half of the somatic cells of the parent.
When two gametes joinduring this fussing (2n) Haploid cell (n)
Chromosomes 2 sexual
Humans: 46
44 autosomal23-male (father)
23-female (mother)
Phases
Prophase I II
Metaphase I II
Anaphase I II
Telophase I II

IMPORTANCE OFMEIOSIS:
facility of genetic recombination variability

* PROPHASE I
Chromatin begins to condense.
Centrosomes
Condensation of Chromosomes
Chromatin
Nuclear
membrane

*METAPHASE I
Equatorial plate.
Tetrads line up in the equator of the cell

Chromatids
* ANAPHASE I
Centromeres begin to move to opposite sides of the poles, and each carries a...
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