Principle of Inheritance and VariationMediumBloom L1
Question
Which one is the incorrect statement with regards to the importance of pedigree analysis?
Options
A.It helps to trace the inheritance of a specific trait
B.It confirms that DNA is the carrier of genetic information
C.It helps to understand whether the trait in question is dominant or recessive
D.It confirms that the trait is linked to one of the autosome
Solution
Sol.(b) [Key Concept: Pedigree Analysis — Limitations] The incorrect statement is (b): Pedigree analysis DOES NOT confirm that DNA is the carrier of genetic information. Pedigree analysis traces inheritance patterns across generations in families — it reveals whether a trait is dominant or recessive, sex-linked or autosomal, and can determine carrier status and recurrence risks. The proof that DNA is the genetic material came from biochemical/molecular experiments (Avery-MacLeod-McCarty experiment, Hershey-Chase experiment), NOT from pedigree analysis.
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