Mendel's dihybrid cross between two double heterogotes (AaBb  x AaBb) gave you the phenotypic ratio of 15:1, assuming that the dominant allele is completely dominant over the recessive allele. Which of the following is CORRECT?

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Suppose that a Mendel's dihybrid cross between two double heterogotes (AaBb  x AaBb) gave you the phenotypic ratio of 15:1, assuming that the dominant allele is completely dominant over the recessive allele. Which of the following is CORRECT?

 

  A.

The A_B_ and aabb have the same phenotype. (_ means either the dominant allele or recessive allele)

  B.

The aaB_ and aabb have the same phenotype. (_ means either the dominant allele or recessive allele)

  C.

The aaB_ and A_bb have the same phenotype. (_ means either the dominant allele or recessive allele)

  D.

All of the above.

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