Much of what we know about single-gene traits in humans is the result of studying

Explanation:

While a few traits are due to only one gene (and its alleles), most human genetic traits are the product of interactions between several genes. The traits listed on the next pages have commonly been presented as being determined by single genes.

the first two-party system consisted of the federalist party, who supported the ratification of the constitution, and the democratic-republican party or the anti-administration party (anti-federalists), who opposed the powerful central government, among others, that the constitution established when it took effect in

answer; construals;