Chromosome 2

Species
In the twentieth century scientists thought there were 24 chromosomes in the human genome. Gorillas and chimpanzees have 24 chromosomes to our 23, because the human Chromosome #2 is a combination of two ape chromosomes. “Humans are an ecological success,” the only competition we have are domestic animals and we have colonized almost all habitats. In this chapter we discovered that humans and chimps genetically are 98% the same. There is no specific time in which there was a separation but scientists have discovered a split in the chimpanzee population. The human species was half of the population which developed a genetic mutation that did not allow breeding between both populations. Along with the human species they brought along different ways of sexual selection from the other two species. Humans brought methods like the monogamous system and attraction to more youthful mates. Monogamy shaped our hunting/gathering habits and a “sexual division of labor”. Ridley explains to us that the difference is found in the genes.