Explain the use of lactase to produce lactose-free milk

so people who are lactoes intolerant dont shat all night :)

Explanation:

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

i think the answer is 95 hope this