Did all the different races and ethnicities come from Adam and Eve?

[TonyChanYT]

Yes, Acts 17:

26a From one man he made all the nations, that they should inhabit the whole earth;

My guess is that Adam and Eve started their lives 15,000 years ago. Adam's genome contained the potential variations of all the human features that we observe today.

God destroyed all men except Noah's family, Genesis 8:

18 So Noah came out, together with his sons and his wife and his sons’ wives.

Now, these eight people constituted the Homosapien gene pool.

Further down in history, Genesis 11:

9 That is why it was called Babel —because there the LORD confused the language of the whole world. From there the LORD scattered them over the face of the whole earth.

This was the beginning of human separation and clustering, and local groups of people were formed. People within a large cluster tended to exhibit the traits of dominant genes. In small clusters, recessive genes had a chance to flourish more. All human beings are 99.9 percent identical in their genetic makeup. It doesn't take much genetic variation to show many physical differences between the races.

I am 100% Chinese, and my wife is 100% Caucasian. Our #3 son has brown hair, except for a couple of small isolated patches of blond streak