Blood Typing- GAMEDAY  Objective:  SWBAT create and analyze Punnett Squares related to blood typing  Catalyst:  In northeast Kansas there is a creature know as a wildcat. It comes in three colors, blue, red, and purple. This trait is controlled by a gene with incomplete dominance. A homozygous (BB) individual is blue, a homozygous (bb) individual is red, and a heterozygous (Bb) individual is purple. What would be the genotypes and phenotypes of the offspring if a blue wildcat were crossed with a red one?homozygous heterozygous genotypes phenotypes

Agenda  Catalyst Review  Incomplete Dominance Example  Co-dominance example  Quiz  Blood Typing  Project Work Time  Exit Question

 RR = red  Rr = red  rr = white  RR = red  Rr = mix  rr = white  RR = red  RW = both at once  WW = white Normal Incomplete Dominance Co- Dominance

Have you ever wondered…  Why do we have different types of blood?  Why could you die if you get a transfusion of the wrong type of blood?  How can parents give birth to kids who have a different blood type than them?

Remember  Incomplete dominance is where the heterozygous genotype is in between both the dominant and the recessive genotype.  RR- red  Rr- pink  rr- white

Incomplete dominance  In Jhaveri-land, the gene for loving biology is incompletely dominant. A person with two dominant alleles loves biology, a person with two recessive alleles (GASP) does not love biology, and a person with one of each only loves biology during the school week.  If Two heterozygous people mate, what are the genotype and phenotype probabilities?

Co-dominance  The gene for fur color in googamoogas is co- dominant with both black and white. Find the genotype and phenotype probabilities if a pure black googamooga mates with a pure white googamooga.

QUIZ TIME!!  Put everything away, you have 15 minutes!  Kick butt, let’s see how much you’ve learned this week!!

Blood Typing  Sometimes there are more than two alleles for a trait. The most important one for you to learn about is… blood type!  Key Point #1:  Blood type has three alleles: I A, I B, and i. I A and I B are co-dominant. i is recessive.

Blood Types  I A and I B are co-dominant  I A I A = Type A  I B I B = Type B  I A I B = Type AB  i is recessive  I A i = Type A  I B i = Type B  i i = Type O

 Show the potential offspring between a mother who is heterozygous for Type A blood and a father who is heterozygous for Type B blood. IBiIBi I A i IAIBIAIB GENOTYPES: PHENOTYPES:  I A i: 25%  I B i: 25%  I A I B : 25%  ii: 25%  Type A: 25%  Type B: 25% Blood Typing I B i I A ii  Type AB: 25%  Type O: 25%

 Show the potential offspring between a father who is homozygous for Type A blood and a mother who is homozygous for Type B blood. GENOTYPES: PHENOTYPES: GP 5

 Show the potential offspring between a mother who is Type O blood and a father who is Type AB blood. GENOTYPES: PHENOTYPES: GP 6

Project Work Time

Exit Question  If Chris Brown has Type AB blood and Rhianna has Type A blood, what are genotype and phenotype probabilities for their child.