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Fish Biotechnology- ICAR JRF/SRF 2024
MCQ (Single Correct)
Allozyme markers are less polymorphic because
EXPLANATION
Cell Organelles, Cytoskeleton, Membrane Dynamics, Ion Channels and Apoptotic Cascades (TNF, FasL)
- Polymorphism of Allozyme Markers:
- Allozymes (allelic variants of catalytic enzymes) show relatively low genetic polymorphism compared to DNA markers (microsatellites, SNPs) because:
- They are encoded by conserved functional coding sequences subjected to strong purifying selection.
- The degeneracy of the genetic code means synonymous base substitutions do not change amino acids.
- Starch gel electrophoresis detects only substitutions that alter net electrical charge (approximately one-third of all amino acid substitutions).
- Correct Option: Option 4 (Coding sequences are conserved, genetic code is degenerate, and electrophoresis limits detection).
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