Slide 1

Blood Type Inheritance and the Punnett Square

Slide 2

Blood Type Inheritance Type O blood = oo (recessive) Type B blood = BB (homozygous) or Bo (heterozygous) Type A blood = AA (homozygous) or Ao (heterozygous) Type AB blood = AB

Slide 3

Terms to be familiar with Homozygous = same letters (alleles) Heterozygous = different letters (alleles) Genotype = letters (inherit 1 from each parent) Phenotype = physical appearance of trait (actual blood type) Dominant = shows up; covers up recessive trait Recessive = trait that can be masked

Slide 4

Punnett Square

Slide 5

One parents genotype goes here The other parent goes here

Slide 6

Punnett Square Possible Offspring Genotypes Go Here One parents genotype goes here The other parent goes here

Slide 7

Punnett Square Possible Offspring Genotypes Go Here (25% chance) Possible Offspring Genotypes Go Here (25% chance) Possible Offspring Genotypes Go Here (25% chance) Possible Offspring Genotypes Go Here (25% chance) One parents genotype goes here The other parent goes here

Slide 8

Example Jack and Jill get married and have a child. Jack is heterozygous for the blood Type A and Jill has type AB blood. What is the chance that they will have a baby with type B blood?

Slide 9

Punnett Square

Slide 10

Punnett Square drop and drag to fill in the squares AAAo ABBo Ao ABAB

Slide 11

Based on the Punnett Square, there is a 50% the child will type A blood, 25% the child will have type AB blood, and a 25% the child will have B blood. AAAo ABBo Ao ABAB

Slide 12

Example Jack and Jill get married and have a child. Jack is heterozygous for the blood Type A and Jill has type AB blood. What is the chance that they will have a baby with type B blood? Based on the results on the previous slide, there is a 25% chance a child of Jack and Jills will have type B blood.

Slide 13

Example 2 Bonnie and Clyde are having a baby and they want to know if there is a chance that they can have a child with Type O blood. Bonnie is homozygous for type A blood and Clyde has type O blood. What did you find out?

Slide 14

Punnett Square

Slide 15

Punnett Square drop and drag to fill in the squares Ao oo AAAA

Slide 16

They will not have a child with Type O blood. There children will only have type A blood (100% chance). Ao oo AAAA