Genetic Features - Figure 1. Loss of a sex chromosome during gametogenesis
A - Normal meisosis leads to production of spematocytes with a single sex chromosome.
B - Abnormal meiosis leads to production of a spermatocyte with no sex chromosome.
C & D - If the abnormal sperm fertilizes a normal egg, the result will be a 45,X embryo. The same result happens if an egg loses its X chromosome during meiosis, and then gets fertilized by a normal sperm containing a single X
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