Biology Inheritance / Variation & Genetics ETEA 2023 Retake
PMDC Verified Question 37 of 94
Mendel's law of independent assortment can be explained by:
A
Behavior of chromosomes in mitosis
B
Behavior of chromosomes in meiosis
C
Gene behavior in mitosis
D
Both A and B
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Behavior of chromosomes in meiosis
Concept:

Mendel's abstract "laws" were later validated by the physical mechanics of cell division discovered decades later.

Solution:

  • Mendel's Law of Independent Assortment is mechanistically explained by the behavior of chromosomes during meiosis.
  • Specifically, during Metaphase I of meiosis, homologous chromosome pairs align at the cell equator randomly. The orientation of one bivalent does not influence the orientation of another.
  • This random alignment ensures that maternal and paternal alleles for different genes segregate independently into the gametes.


Why other options are incorrect:

  • Mitosis: Mitosis creates genetically identical somatic cells. It does not involve the pairing, crossing over, and independent assortment of homologous chromosomes that creates genetic diversity in gametes.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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