Chromosome Analysis and Karyotype Analysis

Chromosome analysis or karyotyping is a test that evaluates the number and structure of a person’s chromosomes in order to detect abnormalities. Chromosomes are thread-like structures within each cell nucleus and contain the body’s genetic blueprint. Each chromosome contains thousands of genes in specific locations. These genes are responsible for a person’s inherited physical characteristics and they have a profound impact on growth, development, and function.

Humans have 46 chromosomes, present as 23 pairs. Twenty-two pairs are found in both sexes (autosomes) and one pair (sex chromosomes) is present as either XY (in males) or XX (in females). Normally, all cells in the body that have a nucleus will contain a complete set of the same 46 chromosomes, except for the reproductive cells (eggs and sperm), which contain a half set of 23. This half set is the genetic contribution that will be passed on to a child. At conception, half sets from each parent combine to form a new ___ ________ _________ _______ _______ _________ _______ _____ ______ __________ _________ ___.
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