This can be because of their genetics. The siblings may not have inherited their parents looks, but maybe they inherited their grandparents looks, or even their aunts looks. This is all due to genetics. It's sort of the same thing, when two caucasian parents have an african-american child. That would be because somewhere along the family tree someone was african-american.
Anyways, I hope this helps!
The only exception to the six chromosomes per cell rule for mosquitoes would be gametes or sex cells when cells in the ovary undergo meiosis the result is egg or sperm cells which haploid
A because if you add and do the equation to all the cups
