Perfect Genetics

Och han som fyllde upp hushållet blev en pojke som fick heta Pelle, ögonen var rätt men tyvärr inte håret, jag vet att på riktigt är det större chans att barn får brunt hår, är det så på sims också? För typ 5/34 barn har fått blått hår ._.

Nu får jag vänta tills de äldsta barnen blir ungdomar och flyttar ut med alla barnen så kan jag börja pumpa ut barn igen :x

"The Sims 3
Physical characteristics

Genetics in The Sims 3 are much simplified. There are no dominant and recessive genes, and the game simply combines features of the parents, pulling occasionally from earlier generations such as grandparents. However custom eye color seem to be passed on a lot less likely in generation F1. (ex. Bright green, red). There is a very high mutation (i.e. two dark-haired parents having a child with blonde hair, even though nobody in their family has that hair color) rate of 10%, which can be lowered to a more reasonable rate using mods. Although a mutated eye color will always be one of the default colors, the same ways as most NPC's. (with the exception of those created prior to the start of the game.) Skin tones can be blended by Sims 3 genetics, for example, a sim with light green skin and another with dark blue can still have a child with dark green or light blue skin, as the hue (light or dark) and general color are handed down separately.

In addtion, adopted children in The Sims 3 , unlike in The Sims 2 seem to have a certain amount of their adoptive parents genomes fused into them, since their children can have the exact same hair color or eye color as one of their grandparents who have a custom color. "

Från Sims Wiki

Där har du det, ganska svart på vitt! ;D