Marco has a problem with his doctoral research on the inheritance of fur coloration in lab mice. He is told that black a recessive allele for mouse coloration but in all his years of mating brown colored mice, the few black colored mice that are born invariably die within two weeks while all the brown mice live. Why is this happening? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Black is clearly a recessive lethal allele. b Black coloration is the result of a dominant negative mutation. C Black and brown are the result of epistasis. d Black is a haplosufficient allele