CELL DIVISION
MEIOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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synapsis
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crossing-over
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independent assortment
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tetrad formation
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Detailed explanation-1: -Metaphase I. During metaphase I, the homologous chromosomes are arranged at the metaphase plate-roughly in the midline of the cell, with the kinetochores facing opposite poles. The homologous pairs orient themselves randomly at the equator.
Detailed explanation-2: -In metaphase I, the homologous pairs of chromosomes align on either side of the equatorial plate. Then, in anaphase I, the spindle fibers contract and pull the homologous pairs, each with two chromatids, away from each other and toward each pole of the cell. During telophase I, the chromosomes are enclosed in nuclei.
Detailed explanation-3: -Explain how the random alignment of homologous chromosomes during metaphase I contributes to variation in gametes produced by meiosis. Random alignment leads to new combinations of traits. The chromosomes that were originally inherited by the gamete-producing individual came equally from the egg and the sperm.
Detailed explanation-4: -There are 4 sub-phases in meiosis I: • Prophase I: During prophase I, homologous chromosomes line up side by side. They are physically in contact with one another. This process is known as synapsis. Synapsis is when crossing over occurs.