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17 March, 08:34

At what stage of a life cycle does the chromosome number of cells switch from x to 2x?

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  1. 17 March, 08:49
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    The correct answer will be-fertilization.

    Explanation:

    The chromosome number in an organism is known as the ploidy level which is represented by either n or x. The organism may exhibit 1 set of chromosomes represented with n and is termed haploid and a pair of chromosomes called diploid level represented by 2n.

    The organism can switch from x to 2x at the time of fertilization when separate haploid male and female gametes fuse together to form a diploid cell called zygote which further grows into an organism.

    Thus, fertilization is the correct answer.
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