Do we have any creationists here?

[watchamadoodle]

A couple of thoughts:
(1) No daughters are mentioned in Genesis (that I recall), but no daughters were required to make it work. The sons could simply marry those hot monkey women.
(2) Before the flood, there must have been many humans with no DNA from Adam. The population of Homo sapiens monkeyus must have been quite large 6000 years ago when Adam was kicked-out of the Garden of Eden.

As for your first thought, Genealogies trace bloodlines. So only first born males who had heirs, were recorded.
For instance, Abel was never recorded in the genealogy of Adam, because he died having no sons.

Cain, also wasn't part of Adam's genealogy, but for a different reason...

Thanks, I wasn't aware that only males with children were recorded, so Adam may or may not have had daughters.
However, there is another argument for Drich's theory that Adam's children married the naturally evolved humans - genetic diversity. I don't know how many humans are required to start a healthy population, but I'm sure it is more than two.