What do the empty shapes in a pedigree chart mean?

a)Unaffected/Carrier
b0Affected

Uhh normally they mean that the person is unaffected or a carrier, but you'd have to look at a specific one since some have different keys.

answer; ///i believe the answer is (antioxidant);

yes

no

blue is scattered more than other colors because it travels as shorter, smaller waves. this is why we see a blue sky most of the time.