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1 May, 23:05

Pairing of homologous chromosomes at metaphase of meiosis i appears to be critical for proper alignment, crossing over, and subsequent separation. this pairing is facilitated by sharing of sequence homology. if x and y chromosomes are so different, how can they achieve the necessary pairing?

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  1. 2 May, 00:46
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    The correct answer for the question that is being presented above is this one: "d. A special function of the spindle apparatus forces X and Y together."

    Here are the following choices:

    a. They do share short homologies at their respective tips.

    b. They use a unique sex-linked mechanism not present in other pairs.

    c. They do not need to pair because they are not a homologous pair.

    d. A special function of the spindle apparatus forces X and Y together.
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