1.cutting chromosomes by ½
2.genetic diversity
MI- everything happens in PAIRS
PI- pairs amount together (tetrad)
-crossing over can happen
MI- pairs in middle (genetic diversity)
AI- pairs isolated (independent assort. (Genetic assort)
Mitosis-2 diploid identical daughter cells
Meiosis- haploid different daughter cells
PHASES OF litotes I
Interphase I- cells undergo round of DNA replication, forming duplicate chromo.
Prophase I- failly chromo. Pairs with its corresponding homologous chromo. To form a tetrad
Metaphase I- spindle fibers isolate to the chromo.
Anaphase I- fibers pull the homologous chromo. Towards opposite ends of the cell
Telophase I & Cytokinesis-nuclear membranes form. Cell separates into 2
PHASES OF MEIOSIS II
Prophase II-meiosis I results in two haploid (N) daughter cells, severally with half the number of chromo. As the original
Metaphase II- chromo. Line up in a similar way to the metaphase stage of mitosis.
Anaphase II- sister chromoatids separate and move toward opposite ends of the cell
Telophase II & Cytokinesis- meiosis II results in four haploid (N) daughter cells
DIFF.
surrounded by M1 & M2
Meiosis I and meiosis II be very much as well except that mII produces four haploid cells from the two haploid cells that were produced in mI
PURPOSE OF MEIOSIS
To cut the chromosomes in half
GOALS OF MEIOSIS
To form gametes
DIFFERENCES BETWEEN MEI/MITOSIS
The two cells that come out of the division of mitosis be exactly the same in genetic makeup as the original parent cell, with the same dna. Whereas, in meiosis, the cells are not the same, hence the purpose of meiosis, to make new cells. The whole canonical principle of this is that normal cells undergo mitosis, while only conjure up cells undergo meiosis
CHROMOSONAL DISORDERS
Super female-XXX
Turner female-XO
Kleinfelters male-XXY
Super male- XYY
VOCAB
Genetics-scientific study of heredity(how traits are passed)
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