When the genotype consists of a dominant and a recessive allele, the phenotype will be like the....................allele.

Rationale

When the genotype consists of a dominant and a recessive allele, the phenotype will be like the dominant allele.

In a heterozygous genotype where one allele is dominant and the other is recessive, the dominant allele dictates the phenotype. This means that the observable traits will reflect the characteristics of the dominant allele, overshadowing the recessive allele.

A (Dominant) CORRECT

The dominant allele is expressed in the phenotype when present, regardless of the recessive allele. This results in the phenotype resembling the dominant trait, which is characteristic of how dominance works in Mendelian inheritance.

B (Recessive) YOUR ANSWER

The recessive allele is only expressed in the phenotype when the genotype is homozygous recessive (i.e., two recessive alleles). In a heterozygous situation, the presence of the dominant allele prevents the recessive trait from being visible, thereby making this choice incorrect.

C (Both) YOUR ANSWER

While both alleles are present in the genotype, the phenotype displays only the trait of the dominant allele in a heterozygous scenario. The recessive trait does not manifest unless both alleles are recessive, so this option does not accurately describe the phenotype.

D (Neither) YOUR ANSWER

This choice incorrectly suggests that the phenotype is neither like the dominant nor the recessive allele. Since the dominant allele determines the phenotype in a heterozygous genotype, this statement is false.

Conclusion

In a scenario with a dominant and a recessive allele, the phenotype will reflect the dominant allele's characteristics. Dominance in genetics dictates that the presence of a dominant allele will mask the expression of a recessive allele, resulting in a phenotype that is exclusively determined by the dominant trait. Thus, understanding these principles of inheritance is crucial in predicting phenotypic outcomes in offspring.

When the genotype consists of a dominant and a recessive allele, the phenotype will be like the....................allele.

When the genotype consists of a dominant and a recessive allele, the phenotype will be like the dominant allele.

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