Blood Type 3 Alleles for blood type: A, B, O A & B are co-dominant (I); O is recessive (i) Blood type is determined by the proteins found on the red blood cells (RBC) Phenotype Genotype A IAIA or IAi B IBIB or IBi O ii AB IAIB

Blood Types Antigens: substances that promote the production of antibodies to kill off cells that may harm the body RBC Protein Markers(Antigens): A Allele: Antigen A O Allele: None B Allele: Antigen B Type A: antigen A makes anti-B antibodies and kills type B off Can receive type A or O blood; donate A or AB Type B: antigen B makes anti-A antibodies and kills type A off Can receive type B or O blood; donate B or AB

Blood Types Type O: No antigens, makes anti-A and B; kills off type A and B blood Can receive type O blood; donate to anyone Type AB: Antigen A & B; NO antibodies produced Can receive any type of blood; donate to AB only Review: Type A: receive A or O blood; donate A or AB Type B: receive B or O blood; donate B or AB Type O: receive O blood; donate to A, B, O, or AB Type AB: receive any blood; donate to AB only

Blood Type: Rh Factor Named after Rhesus monkey Rh factor is based on different protein markers (antigens) People can be either Rh+ or Rh- (Ex: A+ or A-) Rh+ is dominant; Rh- is recessive Most common blood type: O+ & A+; least common: B- & AB- Type + : Rh antigen does not create Rh antibodies; can receive + or - blood Type - : No antigen, creates Rh antibodies and kills off + blood; can only receive - ; donate to any

Blood Type: Punnett Square You can do a Punnett Square to determine blood type Example: Cross a heterozygous type A parent with a type O parent. Genotypes: Phenotypes:

Blood Type: Punnett Square Example: Cross a homozygous type B parent with a type AB parent. Genotypes: Phenotypes:

Blood Type: Punnett Square Genotypes: Phenotypes: