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MODEL PAPER 3 — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYMODEL PAPER 31 Mark
MCQ
Assertion (A): Siblings are monoparental in origin.
Reason (R): Monoparental progenies are exact copies of the parent.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false but R is true.
✓

Answer

(d) : A is false but R is true.
Explanation:
Sibling are the product of sexual reproduction and commonly biparental in origin. In sexual reproduction meiosis takes place where crossing over occurs. The product of sexual reproduction thus resemble their parents, but this resemblance is never 100%. The monoparental progeny is derived from a single process through the process of mitosis. It possess exact copies of genetic characteristics of the parent.

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