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26 May, 14:11

Which of the following best explains why a Robertsonian carrier may have no health problems due to his or her chromosome rearrangement?

A. Genes on the lost p arms can be found elsewhere in the genome.

B. There are no genes found on any of the p arms of acrocentric chromosomes.

C. All acrocentric p arms contain the same base sequence.

D. The long q arm chromosome copies the genetic information from the p arms before they are lost.

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  1. 26 May, 17:38
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    The correct answer is option A.

    Explanation:

    Robertsonian translocation occurs of 2 acrocentric chromosomes with no problems for the person carrying it in balanced form. In an unbalanced form, it produces chromosome imbalance leads to mental disorder or malformations.

    In this translocation p arm or long arm join with other chromosome's long arm, carrier is normal due to the presence of 2 copies of all chromosome arms so there will be all the copies of essential genes.

    Thus, the correct answer is - option A.
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