Meiosis . Biology 11 Chapter 12. Part I. Meiosis In Males & Females. Meiosis Overview. Meiosis is the process of going from a diploid cell to a haploid cell N = haploid number of any genome For humans n = 23 Your diploid chromosome count is 2n = 46.
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Meiosis In Males & Females
One diploid cell with 2 chromosomes
Separation of Homologous Chromosomes
Separation of Sister Chromatids
Follicle maturing every month
After follicle releases egg
Releases estrogen & progesterone
Mechanisms of Meiosis
How many chromosome does this cell have?
What is n for this cell?
When this cell goes through Meiosis I and II
how many chromosomes will it have?
Separation of Homologs
Hypothetically – the black dash represents a gene for eye color.
Since the separation of the homologs your cell now has only one
gene for eye color and not two as found in the diploid cell
Separation of Sisters
When these homologs separate during _____________
this chromosome will end up in a gamete.
Now it is a mixture of maternal and paternal DNA
Blue = Paternal
Purple = Maternal
Many Complex and physiological
and morphological changes
happen during sperm development
Proteins – instruct neural tube development
Proteins – instruct formation of heart
Proteins – instruct the formation of gut
Asexual reproduction is more efficient because everyone is
capable of reproduction