Question

An example of the quantitative trait in a man is
(a)Hair color
(b)Colour of eye
(c)Skin color
(d)Shape of the nose

Answer 1

Hint A strong genetic component is usually assumed, supporting the apparent differences among world populations, yet the effect of environmental sunlight within the sort of tanning can't be disputed.

Complete answer:
A measurable trait that shows continuous variation; a trait that will not be classified into a couple of discrete classes is named as a quantitative trait. Samples of quantitative traits include height, skin color, weight, and vital sign. Skin color has long been of interest to human geneticists and sometimes used as an example of a person's quantitative trait under relatively well-understood genetic control. There’s no single gene for any of those traits, instead, it's generally believed that continuous variation during a trait like the vital sign is partly because of DNA sequence variations at multiple genes.

Additional information:
Although the essential biology of melanin production and therefore the method of measurement are areas during which skin color studies are fairly well advanced, compared to other quantitative traits, the evolutionary significance, and mode of inheritance are still being debated. Insight of the various steps involved within the production and dispersion of melanin and therefore the sizable amount of loci involved in the coat color of laboratory animals, it's suggested that genetic control of human complexion must be fairly complex.

So, the correct answer is ‘Skin color’.

Note: Phenotypic expression depends on both nature and nurture. Evidence for relatively few loci affecting the differences between racial groups may either be using inappropriate methods, or they'll be concentrating attention on only that portion of genetic variability that distinguishes between blacks and whites. Genetic analysis of intermediate groups and pedigree analysis of rare pigmentation conditions may yield more information on skin color genetics.