Adominant allele (k) is necessary for normal hearing; kk individuals are deaf. a dominant allele (m) on a different locus results in deafness no matter which other alleles are present. if a kkmm individual is crossed with a kkmm individual, percent of the offspring will be deaf. 75 100 0 25 50

75 % will be deaf

Explanation:

K is dominat allele                 kk are deaf  

M results in deafness  

So cross between            kkMm             x                Kkmm

           Alleles will be        kM                 x                  Km

                                          k                      M

                           K             Kk                     MK

                           M            Mk                    MM

Kk normal      

MK     deaf    

Mk    deaf  

MM     deaf            

so 75%  deaf   and  25 % normal

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