Although culture often acts like an umbrella to protect genes from the selective pressures of the environment,it also brings about its own selective pressures.For example,in populations with cultural practices in which fresh milk is an important part of the diet,the gene for the enzyme lactase:

Question

Quizplus · Accepted Answer

Cultural practices involving fresh milk as an important part of the diet have resulted in a high frequency of the gene for the enzyme lactase in these populations. This is because lactase allows for the digestion of lactose in milk, providing a nutritional advantage for those who possess the gene.

Although Culture Often Acts Like an Umbrella to Protect Genes