CELL DIVISION
CELL DIVISION AND CANCEROUS CELLS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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homologous chromosomes pair up
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sister chromatids move to opposite ends of the cell
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nuclear membrane form around newly separated chromosomes
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spindle fibers align chromosomes along the equator of the cell
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Detailed explanation-1: -D) homologous chromosomes are separated with sister chromatids in place.
Detailed explanation-2: -Homologous pairs of cells are present in meiosis I and separate into chromosomes before meiosis II. In meiosis II, these chromosomes are further separated into sister chromatids. Meiosis I includes crossing over or recombination of genetic material between chromosome pairs, while meiosis II does not.
Detailed explanation-3: -Meiosis I & II In meiosis I, chromosomes in a diploid cell resegregate, producing four haploid daughter cells. It is this step in meiosis that generates genetic diversity. DNA replication precedes the start of meiosis I. During prophase I, homologous chromosomes pair and form synapses, a step unique to meiosis.
Detailed explanation-4: -Metaphase I. During metaphase I, the homologous chromosomes are arranged in the center of the cell with the kinetochores facing opposite poles. The homologous pairs orient themselves randomly at the equator.
Detailed explanation-5: -There are 23 pairs of homologous chromosomes, or homologues, in each cell. After replication there are a total of 92 sister chromatids in each cell.