Blood Type Genetics and Inheritance

The video tutorial explains the ABO blood grouping system, detailing the four blood groups (A, B, AB, and O) and the dominance of A and B genes over the recessive O gene. It covers genotypes and phenotypes, using Punnett squares to predict offspring blood types. Real-life examples illustrate problem-solving in blood type determination, including cases involving the Rh factor, which has dominant and recessive phenotypes. The tutorial emphasizes understanding genetic inheritance patterns and their practical applications.

Which blood group is considered recessive in the ABO blood grouping system?

• O

• AB

• A

• B

What is the genotype of a person with blood group AB?

• AB

• OO

• BB

• AA

If a type O female marries a type AB male, what are the possible blood types of their children?

• B and O

• A and O

• A and B

• AB and O

In a scenario where a father is heterozygous type A and a mother is homozygous type B, what are the possible blood types of their children?

• A and AB

• A and B

• B and O

• AB and B

How can you determine the correct parents of a newborn with blood type A, given one parent is homozygous type A and the other is type O?

• The child can be type AB

• The child must be type O

• The child must be type A

• The child can be type B

What is the genotype of Mr. and Mrs. Jones if they have a 3:1 ratio of children with blood types B and O?

• BO and OO

• BO and BO

• BB and BO

• BB and BB

What are the possible genotypes for the Rh+ phenotype?

• +- and --

• ++ and +-

• ++ and --

• ++ and ++

If a child is O negative, what can be inferred about the Rh genotype of the parents?

• Both are --

• Both are +-

• Both are ++

• One is ++ and one is --

What is the genotype of a father with blood type O+?

• OO AB

• OO ++

• OO --

• OO +-

If a mother is A+ and has a child with blood type O, what must be her genotype?

• AO +-

• AO ++

• AA +-

• AA ++