Question

Which of the following is incorrect with respect to pedigree analysis?

• A. It helps to understand whether the trait in question is dominant or recessive.
• B. It confirms that DNA is the carrier of genetic information.
• C. It confirms that the trait is linked to one of the autosomes.
• D. It helps to trace the inheritance of a specific trait.

Answer 1

The correct option is B It confirms that DNA is the carrier of genetic information.

Pedigree analysis gives us an idea about the chances of the progeny inheriting the genetic disorders present in the family. This depiction is done in the form of charts and the probabilities of the appearance of the traits in the current and future generations are calculated based on the observation of traits in the previous generations.
Pedigree charts don't confirm that DNA is the carrier of genetic information. There are several other experiments to prove that.
It helps us to understand the pattern of inheritance for a particular trait, and also to determine whether the trait is dominant or recessive.
It also helps to find out whether the gene for the concerned trait is found on the autosomes or sex chromosomes.
If enough information is available, the chart can even help to locate the source of the trait that is being inherited.