CELL STRUCTURES AND FUNCTION
CELL CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Nucleus breaks down
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Chromosomes cross over in tetrads
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Independent assortment
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Spindle fibers begin to attach to centromeres
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Detailed explanation-1: -Answer and Explanation: The independent assortment of chromosomes occurs during meiosis I. First, during prophase I, the homologous chromosomes exchange genes during a process called ‘crossing over’. Then, during metaphase I the homologous pairs are lined up along the midline of the cell.
Detailed explanation-2: -The centromeres remain attached to the spindle fibers.
Detailed explanation-3: -Like segregation, independent assortment occurs during meiosis, specifically in prophase I when the chromosomes line up in random orientation along the metaphase plate.
Detailed explanation-4: -Answer and Explanation: The stage of meiosis where independent assortment occurs is metaphase I. Metaphase I is the first metaphase that occurs in meiosis where the tetrads of homologous chromosomes align at the middle of the cell.