Zoology - Principles of Inheritance and Variation Question with Solution | TestHub
ZoologyPrinciples of Inheritance and VariationGenetic DisordersMedium2 minPYQ_2017
ZoologyMediumsingle choice
A disease caused by an autosomal primary non-disjunction isNEET 2017
Options:
Answer:
A
Solution:
Non-disjunction is the failure of homologous chromosomes to disjoin or separate and move away to opposite poles. Non-disjunction of the 21stchromosome during oogenesis is the cause of Down's syndrome. It occurs due to the presence of an additional copy of chromosome no. 21 (trisomy of 21stchromosome) is humans.
Stream:NEETSubject:ZoologyTopic:Principles of Inheritance and VariationSubtopic:Genetic Disorders
⏱ 2mℹ️ Source: PYQ_2017
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