Genetic Adam and Eve were the first male and female humans whose genetic lines did not die off. They were not necessarily the first humans. From a scientific point of view, there could have been populations of humans living for an indeterminate amount of time prior to the birth of the genetic Adam or the genetic Eve, and it’s not necessarily true that they mated with each other, only that the maternal line can be traced to Eve and the paternal line to Adam.
In Biblical terms, the genetic “Adam” is actually Noah as someone upthread has already pointed out. All males trace their y chromosomes back to Noah. His wife would then be the genetic Eve.
There were 4 men including Noah on the Ark three of which were Noah’s sons. These son’s would each have 1/2 of genes from Mom and 1/2 genes from Noah.
The descendants after the flood from Noah’s children would contain 1/2 of his genes and 1/2 of mom’s genes.
I’m not aware if Noah or wife had children after the flood.
Noah’s 3 children came with 3 wives, so their children would have been distinctly different from their cousins. There were about 9 generations between Adam and Noah, so the gene mix of the wives could have been very different by Noah’s generation.
In summary, the descendants of Noah children would have had three distinct sets of genes from which the nations flowed. Noah is not likely the common denominator.
“All males trace their y chromosomes back to Noah.”
That sounds scientific, but it is not.