Question

The allele that is expressed in a heterozygous organism is the ______ allele.

• A. dominant
• B. recessive
• C. singular
• D. multiple

Answer 1

The correct option is A

dominant

Only the dominant allele is expressed in homozygous and heterozygous conditions. For example, if the parent organisms are homozygous tall and homozygous dwarf then the progeny will contain all tall offsprings as tallness is the dominant trait.