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NEET2006ZoologyPrinciples of Inheritance and VariationActual

Which one of the following pairs of features is a good example of polygenic inheritance ?

Options

  1. AHuman height and skin colour
  2. BABO blood group in humans and flower colour of Mirabilis jalapa
  3. CHair|pigment of mouse and tongue rolling in humans
  4. DHuman eye colour and sickle cell anaemia

Correct answer

A. Human height and skin colour

Step-by-step solution

Polygenic inheritance is the inheritance pattern of a trait controlled by two or more genes. Genes may be on the same or different chromosomes and each gene may have two or more alleles. The gene expression is influenced by a variety of factors including gender, nutrition, breed, rate of growth, and amount of exercise. These traits are quantitative traits - that is, there is a wide range within the population. Such traits include height, weight, character, working abilities, and some genetic defects. One example is

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