Question

Name the kind of inheritance in terms of expression of
(i) blood groups of humans ..........................................................................
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.................................................................................................................ii) wheat kernel colour ..................................................................................
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(iii) human skin colour? ..................................................................................
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Answer 1

Answer:

I)

Humans can have four different blood types: A, B, AB, or O, which are determined by three different alleles, simplified as A, B, and O. The A and B alleles are dominant over the O allele, but neither A nor B is dominant over the other.

II)

Later it was found that the kernel colour in wheat is determined by two pairs of genes Aa and Bb. Genes A and B are dominant genes which determine the red colour whereas a and b are recessive alleles

III)

Polygenic Inheritance: Human skin color is a good example of polygenic (multiple gene) inheritance. Assume that three "dominant" capital letter genes (A, B and C) control dark pigmentation because more melanin is produced.