What would you expect from the mosquito, its been bombarded with chemicals, its not then going to use a physical change (cept maybe a very minor one). Evolution takes a long time to get anywhere significant. Talking of dogs if you compare a mexican naked dog, a pug and a st bernard tell me then if you cant see the difference, hell its getting to the point where perhaps even their kind could maybe get confused as a few different ones im sure.
Pure bred dogs are the worst effected by hereditary diseases by far, almost every pure alsation develops problems with its hips. The tenth generation and the bad stuff disappears sounds like a bit of folk lore to me.
Unseul
Give a man a fire and he's warm for a day. Set a man on fire and he's warm for the rest of his life....
Blessed are those who can laugh at themselves, for they shall never cease to be amused.
Do unto others before they do unto you.