What is karyotype?

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142. Calcium functions in all of the following ways in animals EXCEPT as (A) a component in some arthropod skeletons (B) an intracellular messenger (C) a cofactor in the coagulation cascade (D) a carrier for certain plasma proteins

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Posted By: Admin on January 13, 2010 in Biology Lecture- Review, Genetics-Review - Comments: 1 Comment »

A karyotype is simply a picture of a person’s chromosomes. In order to get this picture, the chromosomes are isolated, stained, and examined under the microscope. Most often, this is done using the chromosomes in the white blood cells. A picture of the chromosomes is taken through the microscope. Then, the picture of the chromosomes is cut up and rearranged by the chromosome’s size. The chromosomes are lined up from largest to smallest. A trained cytogeneticist can look for missing or extra pieces of chromosome.

site info from: http://www.chromosome18.org/Conditions/Genetics/FAQsAboutChromosomeAbnormalities/WhatisaKaryotype/tabid/120/Default.aspx

The name karyotype is given to the set of chromosomes of an individual, usually when visualized and identified under the microscope. The visualization generally is made with the cells in the initial phases of cell division for the chromosomes to be seen already replicated and condensed.

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