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STD 12 - 4. principal of inheritance and variation — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 12 - 4. principal of inheritance and variation4 Marks
MCQ
Assertion: Aneuploidy may be of hypoploidy or hyperploidy type.

Reason: Monosomy lacks one pair of chromosomes.

  • A
    If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
  • B
    If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
  • ✓
    If the Assertion is correct but Reason is incorrect.
  • D
    If both the Assertion and Reason are incorrect.
✓

Answer

Correct option: C.
If the Assertion is correct but Reason is incorrect.
c
Aneuploidy can be either due to loss of one or more chromosomes (hypoploidy) or due to addition of one or more chromosomes to complete chromosome complement (hyperploidy). Hypopliody is mainly due to loss of a single chromosomes, monosomes $(2n -1)$ or due to loss of one pair of chromosomes, nullisomes $(2n -2)$.

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