Question

which statement describes codominant alleles?
o two alleles that blend to create an intermediate phenotype
two alleles that are expressed separately and equally
o any allele whose presence can be masked by another allele
o any allele that can hide the presence of a different allele

Explanation:

Codominance is a genetic concept. In codominance, both alleles in a heterozygous individual are expressed separately and equally. For example, in the ABO blood - group system, the \(I^A\) and \(I^B\) alleles are codominant. When an individual has the genotype \(I^A I^B\), both the A and B antigens are expressed on the surface of red blood cells.
The option "two alleles that blend to create an intermediate phenotype" describes incomplete dominance (e.g., snapdragon flower color where red and white alleles blend to give pink). The options "any allele whose presence can be masked by another allele" and "any allele that can hide the presence of a different allele" describe recessive and dominant alleles respectively.

Answer:

two alleles that are expressed separately and equally