Inactivation of the genetic activity of one of the X chromosomes in each cell of a female embryo during the early period of embryonic development is referred to as

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This inactivation of one of the X chromosomes in a female embryo was postulated by Mary Lyon and is known as the Lyon hypothesis. The Barr body is the condensed chromatin of the inactivated X chromosome, not the concept of inactivation of its genetic activity. The nucleotide is the basic unit of DNA. A karyotype is the photomicrographic representation of a person's chromosomal constitution arranged according to the Denver classification.

Inactivation of the Genetic Activity of One of the X