offspring

And then, that ancestor passed the Agro genes down to its offspring.

If these particular traits are also heritable, that is, passed from parent to offspring, then there will be a reproductive advantage and that’s what modern evolutionary theory defines as fitness.

And that’s demographics, our third and final of the three D’s, which gives us information about who makes up the population, like the age, sex, and offspring potential of individual members of a population.

But long before we knew what evolution was, humans figured out that if we selected plants or animals with traits we liked and got them to reproduce, their offspring would likely have those same traits.