Down Syndrome

passel Syndrome Sometimes when meiosis ( the division of reproductive cells ) occurs, chromosomes may be lost, left behind, or too many may be passed on, resulting in the birth of a child with a familial or congenital defect or disease. unitary of the most common of these genetic dis bon tons is Down syndrome. This sickness takes its take in from Dr. Langdon Down, who was the first to describe it formally, in 1866. Down syndrome is a originator marked by abnormal physiological and mental growth that is caused by a genetic defect. This genetic defect is caused by an spear carrier chromosome.

People natural with Down syndrome have 47 chromosomes compared to the norma l amount of 46, 23 chromosomes inherited from each parent. This extra chromosome originates more often in the mothers egg than the fathers sperm. Chromosomes are individual, round DNA molecules in a cell nucleus. They contain the genes on with structures that hold the DNA and attend to it in expressing heredity by orchestrating cellular opera...If you want to feel a full essay, order it on our website: OrderEssay.net

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