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In dogs, genes A and B are required for scent.Individuals homozygous for either one or both of the nonfunctional recessive alleles are not able to smell.If a large number of matings were made between two double heterozygotes, what percentage of offspring would not be able to smell? Express your answer as a fraction (i.e. 1/10)

Respuesta :

rehmughal

Answer:

6/16 dogs will not be able to smell.

Explanation:

Genes A and B are considered for scent smell.

Individuals homozygous for either one or both of the nonfunctional recessive alleles are not able to smell.

The final cross would be AaBb x AaBb which has outcome of;

Individual with homozygous nonfunctional recessive alleles (bold ones):

  • One nonfunctional recessive alleles: Aabb, aaBB, aaBb, Aabb, aaBb (5/16)
  • Two nonfunctional recessive alleles: aabb (1/16)
  • All nonfunctional recessive alleles: 6/16 dogs that could not smell scents

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