If two parents who's blood types are both B produce a child that has blood type O, what can you say about the parent's genotypes?

During the process of meiosis, special cells called gametes are formed. gametes only have half the number of chromosomes that the other cells in the body have. what form of reproduction do organisms that produce gametes use?

Nucleic acid certain protein cell membranes certain carbohydrates

What is the problem in this article? what solution does the article propose?