Conversation so far:
what is the length of a black panther
Black leopards range from three to seven feet in length. Black jaguars range from 5.6 to 7.9 feet.
what causes the black panther to be black
Melanism in the jaguar is conferred by a dominant allele, and in the leopard by a recessive allele.

Question: is the whole litter black
Self-contained rewrite: is the whole litter of cats black