Homologous chromosomes homologous chromosomes are identical align on the metaphase plate in meiosis ii carry information for the same traits carry the same alleles

The correct option is homologous chromosomes carry information for the same traits.

Explanation:

Homologous chromosomes can be described as a pair of chromosomes that carry genes for the same traits. The genes may carry the same or different kind of alleles. For example, all humans have 46 chromosomes which exist in pairs. That means humans have 23 pairs of chromosomes. Each chromosome in the pair is homologous to the other one. The sex chromosome might be an exception. For females, the sex chromosomes are similar but for males, the X and Y chromosomes carry different genes.

"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."