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Genetics: Difference between revisions
→Skin Colors
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''Skin colors work differently. The 4 skin tones are S1 (white), S2 (tanned), S3 (brown) and S4 (dark brown). They work on the same patern of allele transmission, but the way the alleles are expressed depends on both. A person will have a skin tone chosen randomly between the tones of his alleles. A S2/S4 alleles person will have a skin ton of S2, S3 or S4, chosen randomly. S1, S2, S3 and S4 are equally recessive. Only alien skin tone seems to be dominant. Hence, a person with A/S1 will be green, always.
''CAS-created Sims, and apparently also generated adopted children, have homogeneous genes (2 brown alleles for a brown haired person for example), so we can always know their whole genome. NPCs (maids, pizza delivery person, etc.) and townies don't always have homogeneous genes, and they sometime dye their hair, so it's very hard, sometimes impossible, to know their genome. You can guess a part of it by having children with them, but a hidden recessive gene can remain hidden for generations, especially if the family has many dominant genes. Hair shape (curly, straight) is not a genetic trait.''
===Facial Features===
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