When dominant and recessive alleles express themselves together,it is called

In which of the following is the expression of both alleles of a gene pair in a heterozygous condition observed?

Alleles which show independent effect are called

When two genes with independent expression are present together, they both express their characteristics, and when they are separate, they express their individual characteristics. This phenomenon is observed in which of the following?

Formation of $AB$ type of blood group in humans is due to . . . . . . inheritance.

Which of the following conditions is true for codominance?