It is observed in the phenotype when homozygous.Group of answer choicesrecessive alleledominant allele

The question pertains to genetics and the observation of phenotypes concerning homozygous alleles.

Understanding Homozygosity

1. Definition: Homozygous refers to having two identical alleles for a particular gene. This can be either dominant (e.g., AA) or recessive (e.g., aa).

Phenotype Observation

2. Phenotypes and Alleles:
   • Dominant Allele: If the organism is homozygous for a dominant allele (AA), the dominant trait will be expressed in the phenotype.
   • Recessive Allele: If the organism is homozygous for a recessive allele (aa), the recessive trait will be expressed in the phenotype.

Conclusion

Since the question asks specifically about the phenotype observed when the organism is homozygous, if the organism carries homozygous dominant alleles, the dominant phenotype will be observed. Conversely, if it carries homozygous recessive alleles, the recessive phenotype will be expressed.

Final Answer

Therefore, the phenotypes observed in homozygosity can correspondingly be a dominant allele (for homozygous dominant) or a recessive allele (for homozygous recessive).