A pure-breeding fruit fly with the recessive mutation cut wing, caused by the homozygous genotype, is crossed to a pure-breeding fly with normal wings, genotype . Their progeny all have normal wings. flies are crossed, and the progeny have a 3:1 ratio of normal wing to cut wing. One male fly with normal wings is selected at random and mated to an female with normal wings. Using all possible genotypes of the flies selected for this cross determine the probability of each cross.

+2 votes

 

Part A
 
What is the probability of the cross male CC x female CC?

 

Part B
 
What is the probability of the cross male CC x female Cc?

 

Part C
 
What is the probability of the cross male Cc x female CC?

 

Part D
 
What is the probability of the cross male Cc  x  female Cc?

 

 

 

 

asked Nov 21, 2012 in Genetics by GeneX ~Top Expert~ (7,947 points)
    

1 Answer

+1 vote

Part A:            1/9

 

Part B:             2/9

 

Part C:            2/9

 

Part D:           4/9

answered Nov 21, 2012 by GeneX ~Top Expert~ (7,947 points)

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