Question

Skin color is controlled by three pairs of alleles. Someone with very light skin has 6 recessive alleles while someone with very dark skin has 6 dominant alleles. A person who has a skin color midway between lightest and darkest ________.

Answer 1

The graph demonstrates the quantitative variation for skin pigmentation.

A bar graph has skin pigmentation color on the horizontal axis and Proportion of population on the vertical axis. From lightest to darkest skin colors, the proportions are: 1/64, 6/64, 15/64, 20/64, 15/64, 6/64, 1/64.

Which conclusion is supported by the graph?

More than half of the population has the central skin pigmentation.

The lightest and the darkest skin pigmentations are equally common in the population. **

The central skin pigmentation makes up more of the population than the rest of the skin pigmentation groups combined.

Fewer people have skin pigmentation lighter than the central peak than people who have pigmentation darker than the central peak.

Step-by-step explanation:

Answer 2

Has three dominant alleles

Step-by-step explanation:

Skin colour is a polygenetic inheritance and it is controlled by three genes pairs of alleles. The human skin is determined by the amount of melanin it contains. A combination of melanin producing alleles determines the skin color.

In the above question, the person has a skin color that is midway meaning only half of the alleles produced melanin. The total number of alleles is 6 and half of it is 3. So, only 3 alleles were dominant and the remaining three were recessive.