Genetics in Action: Codominance

The video explains the composition of blood, focusing on red blood cells and their role in oxygen transport. It details the different blood types (A, B, AB, and O) based on the presence of specific carbohydrates on red blood cells. The concept of codominance is introduced, highlighting how both alleles in blood types are equally expressed.

What is the primary function of red blood cells?

• To carry oxygen throughout the body

• To store nutrients

• To produce energy

• To fight infections

Which carbohydrate is present on the surface of blood type A cells?

• Type B carbohydrate

• Type A carbohydrate

• Both A and B carbohydrates

• No carbohydrates

What blood type has both A and B carbohydrates?

• Type A

• Type O

• Type B

• Type AB

Which blood type lacks both A and B carbohydrates?

• Type A

• Type B

• Type O

• Type AB

What does it mean for blood type to be a codominant trait?

• Alleles are expressed only in certain conditions

• One allele is dominant over the other

• Both alleles are equally expressed

• Neither allele is expressed