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If the dominant allele is represented by a and the recessive allele is represented by a, what would be a possible genotype and phenotype of individual ii. 3?.

Respuesta :

The correct answer is option B.

Genotype AA,  Phenotype-Unaffected.

How did this occur ?

  • The cystic fibrosis is a condition caused by the inheritance of the two recessive allele, It is an autosomal recessive disease.
  • In the given case, the parents are carriers, and the carriers are always heterozygotes.
  • Hence, the phenotype of the both parent should be Aa. A possible cross of the parents is shown in the figure below.
  • In case, the progeny have a single dominant trait, the child would not be affected, but will be a carrier and can pass the disease to offspring.
  • In case, the child inherit both the dominant allele (homozygous dominant) from the parents, then he/she would be unaffected. In case, the phenotype of the child is homozygous recessive then it would be affected.

To know more about Genotype from the given link

https://brainly.com/question/22117

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