Part of the fun of Sims 2 is in the mucking around with genetics.
This photo shows sims Frankie and Gentleman with their spawn, Manly. I created Frankie in Body Shop, using a custom skin tone. Gentleman was downloaded from the Sims 2 Exchange (Gentleman is based on a character from the "Hush" episode of Buffy the Vampire Slayer).
Manly is an interesting child, featuring his mother's soft green skin and his father's white eyes. It will be interesting to see how he develops and his looks change as he ages.