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(B) : 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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polygenic inheritance

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(B) : 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 a unit fraction to the trait,and the total phenotypic expression is the cumulative effect of all dominant alleles of the polygenes.Human skin colour is a classic example of polygenic inheritance,controlled by three pairs of genes: $A, B$,and $C$.Dark skin colour (Negro) results from the presence of all six dominant alleles $(AABBCC)$.Very light or white skin colour results from the presence of all six recessive alleles $(aabbcc)$.

Inheritance of skin colour in humans is an example of

Similar Questions

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

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 $\%$)?

Which of the following statements is correct about polygenic inheritance?

Flower color in plants is an example of quantitative inheritance,and it is controlled by two pairs of genes. What fraction of plants in the $F_2$ generation will show the parental phenotype?

The kernel color of wheat is determined by three pairs of polygenes. In a cross between $AABBCC$ (dark color) and $aabbcc$ (light color),what will be the proportion of $F_2$ progeny having a kernel color similar to either of the two parents?

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