And remember, NEVER put petroleum-or mineral oil-based products on a sunburn. Because they form a seal, they'll lock in the heat into your skin, making the burn worse, not better. It could even lead to permanent scarring. Petroleum-based products form a seal on your skin...
Homozygous (or Purebred) - The genotype for the characteristic has the same genes/alleles (e.g. BB, bb). Heterozygous (or Hybrid) - The genotype for the characteristic has different genes/alleles (e.g. Bb). Wild-type - The most common phenotypes in a population are called the wild-type.
Breeds do have tendencies but I find the individuality of the different chickens is more inmportant than the breed. If you want to keep the breeds pure, you will need to separate them for breeding. I don't but them being purebreds is not one of my goals. You are a lot more limited by your goals than by your chickens.