Because we humans are made from zygote which is formed by a combination of two haploid gametes !!
When the sperm and ova meet there is a crossing over type phenomenon which decides what will be the phenotype !! so we somewhere distinct from both our parents !!
Coca-cola was founded in the 1800s, stock market was created in the 1700s, modern culture wars started in the roaring 20s, and Florida's college system didn't start until the 30s.
