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Brown-eyed alma has a blue-eyed mother and a brown-eyed father. In this case, her brown eyes were determined by a _____ allele.

Sagot :

Her brown eyes in this case were caused by a dominant allele.

What are dominant alleles, exactly?

  • When more than one allele is present, a dominant allele is a gene variant that will still cause a particular phenotype.
  • A dominant allele typically codes for a functional protein.
  • The allele is dominant because it produces enough enzyme from a single copy to allow a cell to have an abundance of a certain product.

Why are some genes dominant alleles?

  • A dominant allele is referred to as dominant because it conceals the recessive trait and appears in the phenotype of a heterozygous species.
  • One allele is all that is required to express the trait.

learn more about dominant allele here

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