CELL DIVISION
MEIOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Spindle fibers / centrioles
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heterozygous alleles / homozygous alleles
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homologous chromosomes / sister chromatids
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sister chromosomes / homologous chromosomes
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Detailed explanation-1: -The pairing of homologous chromosomes takes place in prophase I of meiosis which is separated in anaphase I leading to reduction of chromosome number to half. During anaphase II the sepsration of sister chromatids takes place.
Detailed explanation-2: -In anaphase II, the sister chromatids separate and are pulled towards opposite poles of the cell.
Detailed explanation-3: -During anaphase, each pair of chromosomes is separated into two identical, independent chromosomes. The chromosomes are separated by a structure called the mitotic spindle.
Detailed explanation-4: -During anaphase I, the homologous chromosome pairs separate and are pulled to opposite poles of the cell by spindle fibers attached to the centrioles. This first cell division process is completed during telophase I.
Detailed explanation-5: -During anaphase 1, homologous chromosomes separate and move to opposite ends of the cell. With anaphase 2, the sister chromatids separate in much the same manner as mitotic anaphase. Because the separation of genetic material occurs during anaphase, this step needs to be tightly regulated.