WebIt is an inactivated X chromosome. It is formed as part of a mechanism for dose compensation. The number of Barr bodies per cell is always equal to half the number of X chromosomes present. It is a darkly stained region near the nuclear envelope of interphase cells. It is the same X chromosome in every cell. WebThe term chromosome was coined by W. Waldeyer in 1883 to describe darkly stained material in the nucleus. Chromosomes in prokaryotic cells Prokaryotic cells mostly have a single circular chromosome. Some bacteria have linear chromosomes also. They are present in the cytoplasm as the nucleus is absent.

Difference Between Constitutive and Facultative Heterochromatin

WebA. Klinefelter Syndrome. Individuals with this syndrome are usually short, have skin flaps on neck, and underdeveloped breasts. They have external female genitalia but their ovaries are rudimentary. A. Klinefelter Syndrome. B. Turner Syndrome. B. Turner Syndrome. failure of the sex chromosomes to separate properly during meiosis is called _______. WebThe bulk of the chromatin is made up of euchromatin. Within a chromosome there may be small areas of dark staining connected by lightly staining regions. Recently, staining … payless careers chula vista

Chromosome Structure, Staining, and Naming – Lablogatory

WebSep 1, 2012 · In view of this, meiotic behavior of chromosomes in 2 North Indian species of Coreinae viz. Homoeocerus signatus Walker (Homoeocerini) and Petillopsis patulicollis (Walker) (Petascelini) has been... WebExplanation: An X chromosome that has been inactivated does not look or acts like other chromosomes. Chemical analysis shows that the DNA is modified by the addition of numerous methyl groups. This provides the structure a highly condensed darkly stained structure called the Barr body. WebA dark stain is often associated with fossils of the Burgess Shale, representing decay fluids that were squashed out of the organism during the taphonomic process.. … screw gauge uses