sickle cell




homozygous genotype


homozygous genotype


heterzygous genotype


heterzygous genotype



     heterzygous genotype
DNA




Y




     GAA
2. GCA

 3. GCC

 4. GGC

      GAA

                        UAA

UAG   AGG   G       U




            semen
,

,



    seminferous tubule

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