Which one is the incorrect statement with regard to the importance of pedigree analysis?
Correct answer: A. It confirms that DNA is the carrier of genetic information
- A. It confirms that DNA is the carrier of genetic information
- B. It helps to understand whether the trait in question is dominant or recessive
- C. It confirms that the trait is linked to one of the autosomes
- D. It helps to trace the inheritance of a specific trait
Explanation
Pedigree analysis is a tool used to study the inheritance of traits through generations of a family. It provides insights into whether traits are dominant, recessive, autosomal, or linked to sex chromosomes. However, it does not confirm that DNA is the carrier of genetic information; this was established through molecular biology techniques, not through pedigree analysis. Therefore, the statement that pedigree analysis confirms DNA as the genetic carrier is incorrect.
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About Inheritance
Mendel's laws explain segregation, independent assortment and the prediction of genetic ratios using alleles, genotypes and phenotypes. The chapter also covers linked genes, recombination and crossing over during meiosis, then applies pedigree reasoning to X-linked recessive traits, which show different inheritance patterns in males and females.
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