I am assuming DJ is a white male. If I am wrong read no further. Took genetics 50 years ago however so thing stay with your like genetic characteristics being transferred from sperm and egg to create a new in this case person. First some genes are dominant some recessive and the resultant can not be greater than the dominant gene. This brings me to skin color. DJ is white and recessive, wive is black and dominant. The resultant child can not be darker than the mother. Based upon genetics that girl is now DJ daughter
I am assuming DJ is a white male. If I am wrong read no further. Took genetics 50 years ago however so thing stay with your like genetic characteristics being transferred from sperm and egg to create a new in this case person. You are correct in your assumption regarding D.J., but I think you are a bit over the top when trying to compare skin color of actors hired to portray characters in a television program to the exact probable genetic outcomes.
You could also complain that although D.J., Darlene, and Becky are siblings on the program, based on their skin tones and hair characteristics, they couldn't possibly be genetically related to each other, let alone be the genetic offspring of John Goodman and Rosanne Barr.
It's a television program, not a genetics class.