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Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYPrinciples of Inheritance and Variation3 Marks
Question
What is aneuploidy? Differentiate between trisomic and triploid condition? Name any one trisomic condition found in human.
✓

Answer

Aneuploidy is a phenomenon which occurs due to non–disjunction resulting into gain or loss of one or more chromosomes during meiosis.
S. No.
Trisomic condition
Triploid condition
(i)
This occurs when a chromosome occurs in three copies in a diploid cell.
This occurs when a cell contains three sets of chromosomes.
Trisomic condition in human: Down’s syndrome.

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