Question

When both the alleles are equally expressed in hybrid, the phenomenon is known as

• A. Dominance
• B. Bivalence
• C. Codominance
• D. All of the above

Answer 1

Answer: (C)

Codominance

Genes are units of hereditary information that are located on segments of chromosomes. The genes for a specific trait may exist in different forms known as alleles. An example of an allele or a gene is flower color. A flower may have alleles that make it red or pink and so on. Alleles that always show up when they are present are known as dominant alleles. Alleles that are masked or hidden by dominant alleles are known as recessive alleles. In some situations both alleles are expressed equally. A genetic scenario where neither allele is dominant or recessive and both get expressed is known as 'codominance'.
Blood types are excellent examples of codominance.