Maharashtra State Board course SSC (Marathi Semi-English) 9th
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Write a Brief Note. Down Syndrome - Science and Technology

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ConceptGenetic disorders : A. Disorders due to chromosomal abnormalities:

Question

Write a brief note. 

Down syndrome 

Solution

Down’s Syndrome: Down's syndrome is caused due to the presence of an additional copy of chromosome 21 (Trisomy of 21). It was the first discovered and described chromosomal disorder in humans. The total number of chromosomes in people affected with Down's syndrome becomes 47. Affected individual has short stature, small, round head, furrowed tongue, partially opened mouth, palm crease, congenital heart disease and mental retardation.

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 Balbharati Solution for Balbharati Class 9 Science and Technology (2019 to Current)
Chapter 16: Heredity and Variation
Exercise | Q: 4.1 | Page no. 193
Solution Write a Brief Note. Down Syndrome Concept: Genetic disorders : A. Disorders due to chromosomal abnormalities:.
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