Biology Inheritance / Variation & Genetics ETEA 2019
PMDC Verified Question 74 of 94
How many pairs of homologous chromosomes are present in Pisum sativum?
A
Seven pairs
B
Eight pairs
C
Nine pairs
D
Ten pairs
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Seven pairs
Concept:

Pisum sativum (the garden pea) was the model organism used by Gregor Mendel due to its easily observable traits and short generation time.

Solution:

  • The total diploid number of chromosomes in Pisum sativum is \(2n = 14\).
  • Therefore, there are exactly seven pairs of homologous chromosomes.
  • Coincidentally, Mendel also studied exactly seven contrasting traits in these pea plants.


Why other options are incorrect:

  • Eight, nine, and ten pairs refer to the chromosomal numbers of other plant species, not the garden pea.

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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