Question

1. if the trait is expressed in the heterozygous individual it is called: peripheral recesive co - dominant dominant

Explanation:

• Peripheral: This term is not relevant in the context of genetic trait expression in heterozygous individuals.
• Recessive: A recessive trait is only expressed when an individual has two copies of the recessive allele (homozygous recessive). In a heterozygous individual (\(Aa\)), the recessive allele (\(a\)) is masked by the dominant allele (\(A\)).
• Co - dominant: In co - dominance, both alleles in a heterozygous individual are expressed simultaneously. For example, in the \(ABO\) blood group system, if an individual has \(I^A\) and \(I^B\) alleles (heterozygous for \(AB\) blood type), both \(A\) and \(B\) antigens are expressed. But the key here is the general definition of a trait being expressed in a heterozygote.
• Dominant: By definition, a dominant trait is one that is expressed in a heterozygous individual. If an individual has a genotype \(Aa\) (heterozygous), the allele \(A\) (dominant) determines the phenotype.

Answer:

Dominant