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Standard XII
Biology
Down Syndrome
Loss of a sin...
Question
Loss of a single chromosome produces a condition called
A
Haploidy
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B
Nullisomy
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C
Trisomy
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D
Monosomy
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Solution
The correct option is
D
Monosomy
Monosomy: the condition of having a diploid chromosome complement in which one chromosome lacks its homologous partner.
A trisomy is a chromosomal disorder characterized by an additional chromosome, so the person has 47 instead of 46.
Nullisomic is a genetic condition involving the lack of both the normal chromosomal pairs for a species (2n-2).
So, the correct answer is 'Monosomy'.
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