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(A) : Polygenic (or Quantitative) inheritance is a type of inheritance in which the expression of a trait is controlled by two or more genes. In this,

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Skin colour in humans

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(A) : Polygenic (or Quantitative) inheritance is a type of inheritance in which the expression of a trait is controlled by two or more genes. In this,each dominant allele contributes only a unit fraction of the trait,and the total phenotypic expression is the sum total of the additive or cumulative effect of all dominant alleles of the genes/polygenes.Human skin colour is a classic example of polygenic inheritance,which is controlled by three pairs of polygenes,$A, B$,and $C$.Negro (dark) skin colour is due to the presence of all six dominant contributing alleles $(AABBCC)$.Very light (white) skin colour is due to the presence of all six recessive non-contributing alleles $(aabbcc)$.

Which one of the following is an example of polygenic inheritance?

Similar Questions

Inheritance of skin color in humans is an example of which of the following?

In a plant,the weight of fruits is determined by the number of dominant alleles for several genes. If seven categories of weight are obtained,how many loci are involved in this trait?

Human skin colour is an example of:
$I.$ Multiple gene inheritance
$II.$ Three separate genes controlling this trait
$III.$ Single gene controlling this trait
$IV.$ Two genes controlling this trait
$V.$ Environment plays a significant role in this trait
Choose the correct option.

In a polygenic trait,an individual with three recessive alleles expresses $50 \%$ of the trait,while an individual with three dominant alleles expresses $80 \%$ of the trait. What is the contribution of each dominant allele to the trait (in $\%$)?

Polygenic inheritance in humans is represented by ....

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