The copy number of some human genes such as the salivary amy

The copy number of some human genes, such as the salivary amylase gene AMY1, varies greatly between different individuals. The amylase breaks down dietary starch into smaller sugars. In the case of AMY1, a positive correlation has been observed between the copy number and the amount of amylase in the saliva. You have analyzed DNA samples from two human populations that have diets with low and high starch levels, as shown in the graph below. Which population (A or B) is likely to be the one with traditionally higher dietary starch? Explain. Surprisingly, humans have less than twice as many genes as the nematode C. elegant. Despite having many more cells, more cell types, a much more complicated body plan, and much more complicated behaviors. How can this apparent paradox be explained? Be sure to include a description of the structure of the human genome in your answer.

Solution

Ques-1:

Answer: Population B

The population B has higher AMY1 gene copy number because one variable (number of genes) has increased positively with another variable (starch) result in a positive coorelation compared to population A. In the given histogram, it has clearly observed a increased starch in diet can lead to high AMY1 gene copy numbers