[ARCHIVED] Sims give birth to clones - Genetics don't mix

I can't reproduce clones in my save (I own LD, but started the save a little before getting it), but after reading this post and doing some CAS experiments I feel like the risk to get really ugly Sims is a lot higher than before (and by "ugly" I mean unnatural and weird looking). But maybe this is just my perception because I looked closer now...

Since I'm currently playing a couple with mixed skin tones (one quite dark and one medium) I'm also wondering: have skin tone genetics always be so bad? How can a dark skinned mother and a medium skinned father get a child which has lighter skin than both of them? That doesn't feel right.