Which of the Following Is FALSE of Down Syndrome

question 4

Multiple Choice

Which of the following is FALSE of Down syndrome?

• A) There are homologs in model organisms, such as mice and Drosophila, for genes in the Down syndrome critical region (DSCR).
• B) Studying individuals with partial trisomy of chromosome 21 identified the Down syndrome critical region (DSCR) with a small number of genes responsible for the principal symptoms.
• C) Down syndrome is the most common triploidy (3n) in which individuals have three sets of chromosomes.
• D) Molecular genetic analysis of the chromosomes in infants with trisomy 21 determined that the majority of cases were attributable to maternal nondisjunction in meiosis I.
• E) There is a link between the increased risk of Down syndrome and increased maternal age at conception.

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Definitions:

Caste System

A system of stratification (characterized by low social mobility) in which one’s place in the stratification system is determined by birth.

Social Inequities

Disparities or injustices within a society that prevent individuals or groups from having equal opportunities or treatment.

Agricultural Societies

Societies primarily based on farming and cultivation of land as the main source of livelihood and sustenance, typically featuring a rural lifestyle.

Social Structure

An organized pattern of societal institutions and relationships that together compose a society, dictating individuals' roles and interactions.