Hey this is late, but if an organ fails, like for example the kidney fails right? So then it affects the heart. and so on, because the kidney helps clean the blood and your body needs blood.
How do cells acquire homologous chromosome pairs that carry the alleles that are independently assorted? answer: Fusion of gametes.
If there is a 25% chance of white with short hair, white with long hair, black with short hair, and black with long hair, then there should be a 50% chance since there is a 25% chance each of 2 different short hair bunnies. Hope this helps!