Asked by: Daksha Fleischer
asked in category: General Last Updated: 24th March, 2020

What causes a dark band on the chromosomes?

A karyotype analysis usually involves blocking cells in mitosis and staining the condensed chromosomes with Giemsa dye. What causes a dark band on the chromosome? The dye stains regions of chromosomes that are rich in the base pairs Adenine (A) and Thymine (T) producing a dark band.

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Besides, what causes banding on chromosomes?

Chromosome banding refers to alternating light and dark regions along the length of a chromosome, produced after staining with a dye. A band is defined as the part of a chromosome that is clearly distinguishable from its adjacent segments by appearing darker or lighter with the use of one or more banding techniques.

Beside above, what are the three key features used to read chromosome? To "read" a set of human chromosomes, scientists first use three key features to identify their similarities and differences:

  • Size. This is the easiest way to tell two different chromosomes apart.
  • Banding pattern. The size and location of Giemsa bands on chromosomes make each chromosome pair unique.
  • Centromere position.

Also question is, what are bands in chromosomes?

Medical Definition of Chromosome band Chromosome band: One of the transverse bands produced on chromosomes by differential staining techniques. Depending on the particular staining technique, the bands are alternating light and dark or fluorescent and nonfluorescent. The ends of the chromosome are called telomeres.

What are banding patterns?

Banding patterns are patterns of light and dark transverse bands on chromosomes. The light and dark bands become apparent by staining the chromosome with a chemical solution and then viewed under a microscope. These bands describe the location of genes on a chromosome.

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