okay i'll try to make it easier to understand.
say you have a kuribotchi. okay? you play a bunch of games with it, and the gorgeous (2nd skill points) points go way up. higher than all the others. bam, you have a high chance of getting ura young violetchi.
BUT WAIT.....
if you are on 2nd gen, and your previous character was let's say, ura mametchi. he's obtained with high funny (1st skill points) points, right? then his kid is a girl. it'll be unlikely that she will be ura young violetchi, because her family line is from the ura mame family. do you get it?