Co-dominance InheritanceCo-dominance Inheritance

You are a product of your You are a product of your family and your environment.family and your environment.

Types of inheritanceTypes of inheritanceAutosomal Dominant/RecessiveAutosomal Dominant/Recessive– B vs bB vs b– One allele is dominant over another alleleOne allele is dominant over another alleleX-linked Dominant/RecessiveX-linked Dominant/Recessive– X vs YX vs Y– Alleles are only found on XAlleles are only found on X– Related to genderRelated to genderCodominanceCodominance– One allele does not dominateOne allele does not dominate

CodominanceCodominanceDifferent alleles make different Different alleles make different versions of proteinsversions of proteinsOne is not more dominant than the One is not more dominant than the otherotherThey work together to create a new They work together to create a new phenotypephenotype

Snapdragons: Type of flowerSnapdragons: Type of flowerCome in a variety Come in a variety of colorsof colors

One color is not One color is not more dominant more dominant than anotherthan another

Incomplete dominanceIncomplete dominanceAllelesAlleles– Are equalAre equalHeterozygotes Heterozygotes create a third create a third intermediateintermediate phenotypephenotypeRR= redRR= redWW= whiteWW= whiteRW= pinkRW= pink

Multiple AllelesMultiple AllelesAlleles are different versions of same Alleles are different versions of same genegene– Make slightly different versions of same Make slightly different versions of same

proteinproteinSometimes more than 2 allelesSometimes more than 2 allelesMultiple allelesMultiple alleles– Ex. Blood typeEx. Blood type

Blood TypeBlood TypeRed blood cellsRed blood cells– Carry oxygen to all body cellsCarry oxygen to all body cells– Remove waste awayRemove waste away– Fight infection and diseaseFight infection and diseaseCovered in certain proteins and Covered in certain proteins and sugarssugars

I gene: I gene: Causes red blood cell to express a Causes red blood cell to express a specific carbohydrate on surfacespecific carbohydrate on surface– AA– BB– or both A and B -noneor both A and B -noneWhatever molecules you express is Whatever molecules you express is what blood type you arewhat blood type you are

4 Blood 4 Blood Types(PhenotypesTypes(Phenotypes))Type AType A– Has only A moleculesHas only A moleculesType BType B– Has only B moleculesHas only B moleculesType ABType AB– Has both A and B moleculesHas both A and B moleculesType 0Type 0– Has no A or B moleculesHas no A or B molecules

Blood Type GenotypesBlood Type GenotypesThree allelesThree alleles– IIAA

– IIBB

– II00

Co dominanceCo dominance– Ex. IEx. IA A IIAA =Type A blood type =Type A blood type

IIA A II00 = Type A blood type = Type A blood typeIIA A IIBB = Type AB blood type = Type AB blood typeIIA0A0II00 = Type 0 blood type = Type 0 blood type

Blood type is crucial in medicineBlood type is crucial in medicinePeople often need transfusionsPeople often need transfusions– Loss of bloodLoss of blood

Wrong blood typeWrong blood type– Causes blood clots to formCauses blood clots to form– Can cause heart attacks and strokes or Can cause heart attacks and strokes or

deathdeath

RejectionRejectionMake antibodies to whatever molecules you Make antibodies to whatever molecules you don’t havedon’t have– Ex. Type A rejects any cells with B on themEx. Type A rejects any cells with B on them

Type A can’t accept type B or AB bloodType A can’t accept type B or AB bloodReject bloodReject blood