Zoology - Principles of Inheritance and Variation Question with Solution | TestHub
ZoologyPrinciples of Inheritance and VariationGenetic DisordersEasy2 minPYQ_2020
ZoologyEasysingle choice
In Down's syndrome, karyotyping has shown that the disorder associated with trisomy of chromosome number 21 is usually due to
Options:
Answer:
C
Solution:
Down's syndrome caused by trisomy 21 arises due to an occasional non-disjunction during meiosis when a gamete possesses an extra chromosome (n+1). Fusion with a normal gamete [n + (n + 1)] produces trisomy.
Stream:NTA_ABHYAS_NEETSubject:ZoologyTopic:Principles of Inheritance and VariationSubtopic:Genetic Disorders
⏱ 2mℹ️ Source: PYQ_2020
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