his dad reminds me of Tigerstar

because 25% of kittens would be WdWd, 25% would be ww, and 50% would be Wdw

two white cats having a black kitten is actually 100% genetically possible assuming both parents carry the no white gene since white is dominant over no white
basically
WdWd, WdWs, Wdw = pure white
WsWs = high white
Wsw = low white
ww = no white

Wdw + Wdw would equal ¾ white and ¼ black kittens