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0. Oogenesis and the menstrual cycle
Terms in this set (4)
What does oogenesis refers to?
to the development of an immature oogonium into a secondary oocyte which is ready to be fertilized
When does oogenesis begin?
Oogenesis begins during the embryonic development of the female. This means that a pregnant woman who carries a girl carries not only the next generation as a foetus, but the next generation after that as eggs.
What kind of organisms are human? What does that mean?
Humans are diploid organisms, meaning that we have two copies of each chromosome in each cell, one from the father and one from the mother.
This includes 23 chromosomes from each parent, for a total of 46 chromosomes. The number of copies of chromosomes in each cell is denoted by the letter n. Human cells are 2n, except for gametes.
Before a cell divides what happens?
Before a cell divides the DNA in the cell is replicated. The amount of DNA in the cell doubles, but the number of chromosomes remain the same, but the chromosomes have gotten bigger - instead of being "lines" they are now X-shaped, i.e. two lines joined at the centre. The X-shaped chromosomes are comprised of two sister chromatids, which are identical.
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