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Meiosis and Nondisjunction Questions

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Running head: MEIOSIS AND NONDISJUNCTION 1
Biology - Meiosis and Nondisjunction
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MEIOSIS AND NONDISJUNCTION 2
Biology - Meiosis and Nondisjunction
You have a diploid cell that has an N of 3. If cell goes through meiosis to form gametes and
nondisjunction occurs in meiosis 2 ... what is the number of chromosomes in each of the
four gamete cell?
Meiosis involves division of cells to form multiple cells. Meiosis I involve the process
where one diploid divide to form two haploid cells (Bell, 2013). In the first meiosis, the three
diploids will divide to form six haploids. During meiosis II, two haploids divide to form four
daughter haploids. However, when nondisjunction occurs at least one pair of chromatids do not
separate (Kokotas, Grigoriadou, & Petersen, n.d.). Additionally, one cell will have an extra
chromosome (n-1) while the second will be missing a chromosome (n-1). Every gamete, which is
a haploid cell contains 23 chromosomes. There will be four pairs of gamete cells.
The first cell will divide normally to form 4 daughter haploids, with each having 23
chromosomes. In total, there will have a total of 92 chromosomes.
The second gamete will fail to separate and remain two. There will be a total of 46
chromosomes.
In the third cell, there will be an extra chromosome (n+1), which will split into two and an
additional chromosome. There will be 47 gametes.
The fourth gamete will be missing a chromosome (n-1). The cell will split into two daughter
haploids and multiply with the number of chromosomes in every haploid. There will be (46-1)
chromosomes, which will be 45 chromosomes.
What process begins with two haploid cells and ends with one diploid?
Coitus/Reproduction
What would a defect in these kindle lead to?

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Running head: MEIOSIS AND NONDISJUNCTION Biology - Meiosis and Nondisjunction Name Institution 1 MEIOSIS AND NONDISJUNCTION 2 Biology - Meiosis and Nondisjunction You have a diploid cell that has an N of 3. If cell goes through meiosis to form gametes and nondisjunction occurs in meiosis 2 ... what is the number of chromosomes in each of the four gamete cell? Meiosis involves division of cells to form multiple cells. Meiosis I involve the process where one diploid divide to form two haploid cells (Bell, 2013). In the first meiosis, the three diploids will divide to form six haploids. During meiosis II, two haploids divide to form four daughter haploids. However, when nondisjunction occurs at least one pair of chromatids do not separate (Kokotas, Grigoriadou, & Petersen, n.d.). Additionally, one cell will have an extra chromosome (n-1) while the second will be missing a chromosome (n-1). Every gamete, which is a haploid cell contains 23 chromosomes. There will be four pairs of gamete cells. The first cell will divide normally to form 4 daughter haploids, with each having 23 chromosomes. In total, there will have a total of 92 chromosomes. The second gamete will fail to separat ...
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