Patients with Down syndrome have three copies of chromosome 21, resulting in characteristics like a small head with a flat face and small ears, a short neck, a bulging tongue, upward slant eyes, and impaired development of the nervous system. Why does a patient with Down syndrome have these characteristics? O due to reduced expression of genes resulting from missing genetic information O due to the overproduction of proteins resulting from extra genetic information O due to the abnormal multiplication of cells caused by environmental factors O due to mutations in the cells of the patient caused by environmental factors

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Patients with Down syndrome have three copies of chromosome 21, resulting in characteristics
like a small head with a flat face and small ears, a short neck, a bulging tongue, upward slant
eyes, and impaired development of the nervous system.
Why does a patient with Down syndrome have these characteristics?
O due to reduced expression of genes resulting from missing genetic information
O due to the overproduction of proteins resulting from extra genetic information
O due to the abnormal multiplication of cells caused by environmental factors
O due to mutations in the cells of the patient caused by environmental factors
Transcribed Image Text:Patients with Down syndrome have three copies of chromosome 21, resulting in characteristics like a small head with a flat face and small ears, a short neck, a bulging tongue, upward slant eyes, and impaired development of the nervous system. Why does a patient with Down syndrome have these characteristics? O due to reduced expression of genes resulting from missing genetic information O due to the overproduction of proteins resulting from extra genetic information O due to the abnormal multiplication of cells caused by environmental factors O due to mutations in the cells of the patient caused by environmental factors
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Mutation will causes changes in the genetic composition of an organism. In case of aneuploidy the chromosome number will be changed but this change do not occurs for the entire set of chromosomes.

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