Principle of Inheritance and VariationMediumBloom L3

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

Options

A.quantitative trait
B.Mendelian trait
C.Polygenic trait
D.maternal trait

Solution

Sol.(b) [Key Concept: Pedigree Analysis — Mendelian Traits] Pedigree analysis studies MENDELIAN TRAITS — discrete, qualitative traits controlled by single genes with clear dominant/recessive relationships that can be tracked through family generations. Examples: blood groups, haemophilia, colour blindness, albinism. Quantitative/polygenic traits (height, skin colour, IQ) show continuous variation and cannot be easily tracked through pedigree analysis because they are influenced by many genes and the environment. Maternal traits involve maternal effect genes.

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