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Meiosis Review

QuestionAnswer
What is meiosis? The process of making sex cells- egg and sperm. Cutting the # of chromosomes in half to 23 chromosomes in humans
Gametes are what types of cells? How many sets of chromosomes do gametes have? Sex cells. They have 1 set of chromosomes (haploid, n)
Are gametes haploid or diploid cells? Haploid. Haploid = n; Diploid = 2n
If an organism’s diploid number is 24, its haploid number is... 12
What is crossing over? When non-sister chromatids exchange genetic information (happens in Prophase I). When non-sister chromatids wrap around each other which exchanged that genetic info and it leads to genetic diversity within cells/generic variations between cells.
What are tetrads? When do they form? 2 homologous chromosomes next to each other or 4 chromatids. They form in Prophase (XX)
At the end of meiosis, how many cells are formed? Are they genetically different or identical? 4 cells are formed. They are genetically different.
Define the principal of independent assortment During Metaphase I, tetrads line up in the middle at random. Independent assortment states that all genes are inherited independently of each other. Genes do NOT depend on other genes.
If you are a boy, your chromosomes pair is _____. If you are a girl, your chromosome pair is _____. XY & XX
Created by: 114255
 

 



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