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Introduction:
Reproductive cells which pass on genetic traits from the parent to child are produced by the process of meiosis. In order to maintain the same number of chromosomes in each generation, an organism produces gametes. Gametes are sex cells and have half the number of chromosomes.
Answer to Problem 4STP
Correct answer :
The correct answer is option B. 6
Explanation of Solution
Explanation/justification for the correct answer:
Option B. 6 −During metaphase of meiosis I, pairs of homologous chromosomes line up at the equator of the cell. During anaphase I the homologous chromosomes separate and move to opposite poles of the cell. At the end of meiosis I, the daughter nuclei have half the number of chromosomes. One chromosome from each pair of homologous chromosomes enters the daughter cell. In the given organism there are six pairs of chromosomes. Therefore, at the end of meiosis I there will be only six chromosomes.
Hence, this is the correct option.
Explanation for incorrect answer:
Option A. 3- At the end of meiosis I the daughter nuclei have half the number of chromosomes. One chromosome from each pair of homologous chromosomes enters the daughter cell. In the given organism, there are six pairs of chromosomes. Therefore, at the end of meiosis I there will be only six chromosomes.
Hence, this is not the correct option.
Option C. 9- At the end of meiosis I the daughter nuclei have half the number of chromosomes. One chromosome from each pair of homologous chromosomes enters the daughter cell. In the given organism, there are six pairs of chromosomes. Therefore, at the end of meiosis I there will be only six chromosomes.
Hence, this is not the correct option.
Option D. 12- At the end of meiosis I the daughter nuclei have half the number of chromosomes. One chromosome from each pair of homologous chromosomes enters the daughter cell. In the given organism there are six pairs of chromosomes. Therefore, at the end of meiosis I there will be only six chromosomes.
Hence, this is not the correct option.
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