Question

question 7
lactose intolerance results when a person inherits two defective alleles for the lactase gene. normally, this gene produces the enzyme lactase, which breaks down lactose during digestion. what would most likely happen if a person had one defective allele and the other allele was functional?
a the person would not digest lactose at all.
b the person would digest less lactose than normal.
c the person would make lactase but not use it.
d the person would make more lactase than normal.
e the person would make no lactase but could digest lactose.
10 points

Explanation:

Lactase is the enzyme for lactose - digestion. With one defective and one functional allele, the production of lactase will be reduced compared to having two functional alleles. So, less lactose will be digested.

Answer:

B. The person would digest less lactose than normal.