Biology Inheritance / Variation & Genetics SZABMU 2022
PMDC Verified Question 54 of 94
Mendelian inheritance follows which form of dominance relation?
A
Complete dominance
B
Incomplete dominance
C
Co-dominance
D
Multiple allelic dominance
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Complete dominance
Concept:

Classical Mendelian genetics relies on straightforward dominant-recessive relationships between alleles.

Solution:

  • Mendelian inheritance strictly follows complete dominance.
  • When one allele is completely dominant over the other, the presence of the recessive allele is functionally hidden in a heterozygote.
  • For example, in a heterozygous pea plant (Rr), 'R' is completely dominant over 'r', resulting in a round phenotype.


Why other options are incorrect:

  • Incomplete dominance & Co-dominance: These are non-Mendelian extensions where alleles blend or express simultaneously.
  • Multiple allelic dominance: Mendel only studied traits with two alternative alleles per gene locus.

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