I've been having a discussion about avatar genetics with my gf. here are our topics so far.
1. should aang, tenzin and his kids (when they're old enough) have/have had concubines in order to repopulate the air benders? we both say yes.
2. as there will never be another person who is 100% airbender, will it eventually be diluted out of the bloodline? put another way, would someone who is 1/100000000000th airbender still be able to airbend?
3. would bending be a recessive trait, dominant trait, or somewhere in between?
4. the creators need to make a chart explaining Mendelian genetics in avatar!!!!