Question

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.

Answer 1

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

Step-by-step 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.