Please help me answer 3 & 4! It would be greatly appreciated!

for #3 the answer is D

and for #4 Huntington's Disease is a dominant genetic disorder that is rare but you could also use brown eyes in the European population

Explanation:

both parents are hetrogenus meaning they have a dominant and a recessive trait

you aren't worthless, you are a one of a kind person who, deserves happiness like anyone else, you may not get it but everyone deserves happiness. i hope this .