Genetics and Blood Type Probability

The video tutorial covers blood type genetics, explaining the four blood types (A, B, AB, O) and their six possible genotypes. It emphasizes the importance of understanding genotype notation and memorization for solving genetics problems. Two practice problems are presented: one involving Carly and Corey, both heterozygous for different blood types, and another with Dimitri and Darcy, focusing on predicting their child's blood type. The tutorial concludes with a discussion on universal donors and recipients, highlighting that type O is a universal donor and type AB is a universal recipient.

Which of the following blood types is considered codominant?

• Type AB

• Type O

• Type B

• Type A

How many genotypes are possible for the four known blood types?

• Four

• Five

• Seven

• Six

Why is it important to keep the superscripts attached to the 'I' in genotypes?

• To distinguish between dominant and recessive traits

• To avoid confusion with other genetic traits

• To ensure accurate Punnett square calculations

• To simplify the memorization process

What is the genotype of a person who is heterozygous for blood type A?

• ii

• IBIB

• IAi

• IAIA

In the first practice problem, what is the phenotypic ratio of the possible blood types for Carly and Corey's child?

• 1:1:1:1

• 2:1:1

• 3:1

• 1:2:1

What is the probability that Carly and Corey's child will have type AB blood?

• 0%

• 25%

• 50%

• 75%

In the second practice problem, what is the chance that Dimitri and Darcy's child will have type A blood?

• 0%

• 25%

• 50%

• 75%

What is the probability that Dimitri and Darcy's child will have the same blood type as one of the parents?

• 0%

• 100%

• 50%

• 25%

Which blood type is considered a universal donor?

• Type A

• Type B

• Type AB

• Type O

Which blood type can receive all four types of blood?

• Type O

• Type AB

• Type B

• Type A