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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
How is aneuploidy different from polyploidy? Mention their causes.
✓

Answer

S.No
Aneuploidy
Polyploidy
1.
It is the phenomenon of loss or gain of one or more chromosomes from any pair(s) of chromosomes in a diploid cell/ organism, called aneuploid.
It is the presence of three or more sets of chromosomes in an organism, called polyploid.
2.
It arises due to failure of segregation of members of one more pair(s) of homologous chromosomes.
eg. Down's syndrome, Turner's sydrome, etc.
It arises due to failure of cytokineses following the telophase stage of cell division.
3.
 
It is found in many plants.

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