What? I don’t understand what you are asking.....
Alligators,crocodiles,caimans and lizards
A fish swims with it's fins and breathes under water with it's gills.
DNA is from our generation, all to the beginning, therefore we may inherit traits of our ancestors.
a mutation inhibiting human immunodeficiency virus from entering the host cell. This means that the person who has this gene is unable to contract HIV which is beneficial
Hope this helps!
-Payshence xoxo