I read the question as a difference of traits rather than whole new traits, if that makes any sense.
So my suggestion was that the strength of sexual dimorphism varies. That is, some ethnicities may have a very significant difference in appearance between sexes, but in other ethnicities the difference would be lessened.
Are there other human traits like light skin which people developed to adapt to the "new" environment they settled in?
I'm referring to the human race evolving in the African continent and then migrating to the rest of the world....
Amazon hit with $5.9 million fine for violating California labor law ( www.cnbc.com )
I fed the court transcript from US vs Trump into a New York Law GPT and asked it to pretend to be juror. I then told it to decide each of the charges. This is what it concluded.
You can find the whole chat-log here: https://chatgpt.com/share/ec5a6d5d-95b0-4e54-9741-80a584b9d2ca...