I played sims 2 for years, and I never really caught the gene thing. However, most of my Sims in sims 2 had recessive genes, especially the eye colors. I had two families, one was a single mother with black hair and green eyes, and made all her children share her color. I created another family, where the father had black hair and green eyes, and the mother had brown and blue eyes. I made their first children mini versions of them, so their first son shared his dad's color. He married the daughter from the single mother household, so the granddaughter shared the black hair and green eyes. The single mother's son married another sim I created that was dark skinned, and their child did get black hair from both of them, and her mother's brown eyes. She was lighter than her mother and about one shade darker than her father.
I kind of passed on the Sims 3, I did get some packs, but not all of them. I created some families, and had some good combinations, but I didn't play enough to see how it would effect the next generations.
With Sims 4, I think my biggest issue is how the game mixes a muscular man with a petite woman. Some of the kids look really off when getting the right look for them. I recreated the black haired man with green eyes, and the woman with brown hair and blue eyes from my Sims 2 game into Sims 4. Both parents are a bit slimmer, so I thought they would mix better, but I got body structures that didn't really make sense for them. Other times, I got too many clones, I know making a kid they would look like their parents, but some literally look like a single parent, except the hairstyle. I like having a slight variation between parents so that the kid down't look like only one parent had them.
I am sure if Sims 2 had the technology of Sims 4, there would be more variations wit the genetics.
I do like watching Pleasant Sims, and I agree with some points, but I don't feel that Sims 4 is completely lacking in genetics. I've got some pretty good mixtures.
