When studying finches, charles darwin noticed that within the population of finches, there were three distinct traits. the shape of the beak, the color of their belly, and the length of tail feathers. straight beaks are dominate over curved beaks. red bellies are recessive to magenta bellies. short tail feathers are recessive to long tail feathers. describe the possible phenotypes of the parents of a bird who is homozygous recessive for beak shape, heterozygous for belly color, and heterozygous for tail length. identify the genotypes of offspring and the ratios if this bird mated with a bird who was heterozygous for beak shape, homozygous for belly color, and heterozygous for tail length.

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."