Question

The inheritance pattern of a gene over generations among humans is studied by the pedigree analysis. Character studied in the pedigree analysis is equivalent to:

• A. polygenic trait
  
• B. Mendelian trait
  
• C. maternal trait
• D. quantitative trait
  

Answer 1

The correct option is B Mendelian trait


Pedigree analysis

Pedigree analysis is done to study the pattern of inheritance of a gene or trait that is dominant or recessive in a family.

Traits involved in pedigree analysis :

Pedigree analysis involves the following traits:

• Autosomal dominant traits
• Autosomal recessive traits
• Sex-linked dominant traits
• Sex-linked recessive traits

The pattern of inheritance of Mendelian disorders can be traced through pedigree analysis. If the pattern of inheritance of any of the traits follows Mendel's laws of inheritance, such traits are called Mendelian traits. Hence, character studied in the pedigree analysis is equivalent to mendelian trait.

Polygenic trait :

Polygenic traits are influenced by more than one gene. Examples include skin colour, eye colour and height of an organism.

Maternal traits :

Traits that are genetically passed on from the mother to the offspring are called maternal traits.

Quantitative trait :

Quantitative trait is a measurable phenotype like height of an individual, that depends on many genes and the environment.

Final answer :
b. Mendelian trait