chromosomal aneuploidy

Are There Environmental Factors That Influence Down Syndrome?

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Are There Environmental Factors That Influence Down Syndrome? There are no known behavioral or environmental factors that cause Down syndrome. What environmental factors affect Down syndrome? To date, no behavioral activity of the parents or environmental factor is known to cause Down syndrome. After much research on these cell division errors, researchers know that: In

Why Does Nondisjunction Increase With Maternal Age?

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Why Does Nondisjunction Increase With Maternal Age? One explanation for why meiotic segregation errors are more prevalent in older women is that cohesion between sister chromatids deteriorates with age and renders recombinant chromosomes susceptible to missegregation. Why do chromosomal abnormalities increase with age? A woman age 35 years or older is at higher risk of