The logic behind polar body biopsy is based on:
a. darwin's theory of natural selection.
b. mendel's law of segregation.
c. mendel's law of independent assortment.
d. the rules of the central dogma.
e. the idea that the alleles in a polar body are the same as those in the oocyte to which it was attached.

e. the idea that the alleles in a polar body are the same as those in the oocyte to which it was attached.

Explanation:

Meiosis I in primary oocyte forms a secondary oocyte and a polar body. The secondary oocyte undergoes meiosis II and forms an ovum (egg cell) and a polar body.  

Since polar body and ovum/secondary oocyte are derived from the same precursor cell, they share common alleles. Hence, a biopsy of polar bodies helps to diagnose any possible genetic defects in the embryo during genetic screening.  

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