Question
Differentiate between monosomy and trisomy. Give an example of each from human geneties.
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S.No
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Monosomy
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Trisomy
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1.
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It is the condition where a diploid individual lacks one member of any one pair of chromosomes.
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It is the condition where a diploid individual has an additional copy of a chromosome.
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2.
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The individual has (2n - 1) number of chromosomes.
e.g. Turner's syndrome, i.e. monosomy of X-chromosome.
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The individual has (2n + 1) number of chromosomes.
eg. Down's syndrome, i.e. trisomy of $21^{st}$ chromosome.
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