You are a geneticist hired by a company that breeds pet tige

You are a geneticist hired by a company that breeds pet tigers for super-rich costumers who place orders for cubs with specific combinations of four different phenotypes. What is the probability of producing a cub that will phenotypically resemble either one of the two parents in the following three crosses? Aa Bb Cc Dd x act bb cc dd aa bb cc dd x AA BB CC DD aa bb cc dd x aa bb cc dd

Solution

Answer:

1). Aa Bb Cc Dd x aa bb cc dd

Aa x aa = Aa (1/2), aa1/2)

Bb x bb = Bb (1/2), bb(1.2) of

Cc x cc = Cc(1/2), cc(1/2)

Dd x dd =Dd (1/2), dd(1/2)

The probability of Aa Bb Cc Dd = 1/2 * 1/2 * 1/2 * 1/2 = 1/16

The probability of aa bb cc dd = 1/2 * 1/2 * 1/2 * 1/2 = 1/16

2).

aa bb ac dd x AA BB CC DD

aa x AA = Aa

Bb x BB = Bb

cc x CC = Cc

dd x DD =Dd

The probability of AA BB CC DD = 0

The probability of aa bb cc dd = 0

3) aa bb cc dd x aa bb cc dd

All progeny are genotypically and phenotypically aa bb cc dd.