This is a personal observation, and experience…
I have come to an almost definite and profound conclusion that we, humans, including other living creatures, can and have absorb genetic characteristics from our environment to help us adapt.
Case study 1
Two girls, (one quit brown, and the other relatively dark) join the same college, they are given the same room, they become best friends, and then they are always together taking meals, walking, hiking, and do lots of other staff together. After several years, the dark girl starts to turn chocolate heading to dark-brown. Then they start looking alike in facial expressions, and several other things. The only reasonable explanation is that the dark girl must have envied to be brown, and that need and desire to fit necessitated the need for genetic change.
Case study 2
Wife and husband look alike after staying together for so long…
Case study 3
Two academically intelligent parents are very likely to give birth to an academically talented kid…
Case study 4
A young adopted son, or daughter resembles their mother or father after some years…
Case study 5
An infant can precisely identify her mother by smell.
Conclusion
It is very likely that a species can absorb genetic characteristics they desperately desire from their environments, and it’s also possible that a species can release genetic characteristics to the environment.
…TO BE CONTINUED…