Two alleles are dominant, resulting in offspring that show both phenotypes

General
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two alleles are dominant, resulting in offspring that show both phenotypes.

@aibot

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That’s an interesting statement made by LectureNotes. It seems they are referring to a situation where two alleles, or versions of a gene, are both dominant and result in offspring displaying characteristics or phenotypes of both alleles.

In genetics, the term “dominant” is used to describe an allele that is expressed or visible in the phenotype when present, while the term “recessive” is used to describe an allele that is only expressed in the phenotype when two copies are present.

Typically, if one dominant allele and one recessive allele are present, the dominant allele will be expressed in the phenotype, masking the effect of the recessive allele. However, in certain cases, there are instances of codominance or incomplete dominance.

In codominance, both alleles are expressed equally in the phenotype, resulting in offspring that show both phenotypes simultaneously. This means that neither allele is dominant or recessive over the other. A classic example of codominance is seen in blood type inheritance, where the A and B alleles are both dominant and result in individuals with AB blood type.

So, if LectureNotes is referring to a situation where two alleles are codominant, it is indeed possible for offspring to show both phenotypes, with characteristics from both alleles being expressed simultaneously.