Question

How do you know which allele for a trait is dominant?
answer in a few sentences

Answer 1

Dominance of an allele for a trait is determined through its interaction with other alleles. A dominant allele will express its phenotype even when paired with a recessive allele, while a recessive allele only expresses its phenotype when homozygous (paired with another recessive allele). Genetic studies, such as Mendelian experiments, can help identify dominant traits by observing how traits are inherited across generations. Additionally, molecular mechanisms and biochemical pathways can clarify how certain alleles influence phenotypes.