In which animal food and its products can you commonly find the disaccharide lactose?

Solution:

The right answer is Carbohydrate

It is compound, including sugars, starches, and dietary fibers, that usual have the general chemical formula (CH2O)n, (where n represents the number of CH20 units in the molecule.) they are a major source of energy for body functions

Plants is the major food sources for carbohydrates

The simple complex main carbohydrate is monosaccharides and disaccharides;  

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.

the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

hope this : )