Question

the d and D alleles are used for lighter and darker skin colour in human respectively by keeping in view the inheritance pattern of skin colour in human being choose which combinanation is showing medium skin colour from the following picture

or btao​

Answer 1

Answer:

correct answer

Explanation:

Inheritance of human skin colour is an example of polygenic inheritance. This character is determined by two or more pairs of genes and they have an additive effect. These genes are known as cumulative genes.

Here, more number of dominant alleles results in more expression of that character. Assume that three "dominant" capital letter genes (A, B and C) control dark pigmentation because more melanin is produced. The "recessive" alleles of these three genes (a, b & c) control light pigmentation because lower amounts of melanin are produced. Each "dominant" capital gene produces one unit of colour so that a wide range of intermediate skin colours are produced, depending on the number of "dominant" capital genes in the genotype.

So, the correct option is 'Quantitative inheritance'.