In the Mouse,gene a Allows Pigmentation to Be Deposited in the Individual

question 41

Multiple Choice

In the mouse,gene A allows pigmentation to be deposited in the individual coat hairs; its allele a prevents such deposition of pigment,resulting in an albino.Gene B gives agouti wild- type fur ; its allele b gives black fur.What would the expected ratio of the progeny be in a cross of a doubly heterozygous agouti mouse mated with a doubly homozygous recessive white mouse?

• A)1 agouti :1 black :1 albino
• B)9 black : 27albino
• C)1 agouti :1 black : 2 albino
• D)3 agouti :4 black : 9 albino
• E)9 agouti :3 black : 4 albino