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Incomplete Dominance Codominance Multiple & Sex Linked Traits

Your next test over genetics will be 10/13(midterm-yes includes all up to now) I have the genetics review up on my page already, it would be wise for you to go ahead and start it 2 nd set of journals due 10/7. Incomplete Dominance Codominance Multiple & Sex Linked Traits.

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Incomplete Dominance Codominance Multiple & Sex Linked Traits

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  1. Your next test over genetics will be 10/13(midterm-yes includes all up to now)I have the genetics review up on my page already, it would be wise for you to go ahead and start it2nd set of journals due 10/7

  2. Incomplete DominanceCodominanceMultiple & Sex Linked Traits

  3. Incomplete dominance & Codominance1. Incomplete dominance a. genotype is heterozygous(hybrid) b. phenotype is between the 2 parents c. dominant gene can not fully inhibit recessiveExample: white flowers X red flowers = pink flowers

  4. 2. Codominance a. offspring shows phenotype of neither parent b. both alleles are dominantExample- black chicken x white chicken= checkered chicken = +

  5. B. Multiple and Sex-linked Alleles 1. Multiple alleles: more than 2 alleles control a trait Example-blood type in humans a. blood type is determined by presence or absence of proteins on the surface of red blood cells Examples- A, B, AB, & O

  6. GenotypePhenotype-blood typeAA, AO A bloodBB, BO B bloodOO O bloodAB AB blood

  7. To determine the blood types of possible offspringParents = A blood, O blood Genotypes AA, AO OO A O A A AO O O OO AO O O AO AO AO OO AO

  8. 2. Sex linked alleles: controlled by genes located on sex chromosomes • usually carried on the X chromosomes • Females XX, males XY • If trait is X-linked, males pass the trait on to all their daughters, but none to their sons • mothers have 50/50 chance of passing it to all their childrenExamples-colorblindness or hemophilia Written as- XH or Xh

  9. Quiz #2 Multiple alleles & dominance

  10. A pink flower is an example of ______. A. multiple alleles B. codominance C. incomplete dominance • A checkered chicken is an example of ______. A. codominance B. multiple alleles C. incomplete dominance • Blood type is an example of _____ A. multiple alleles B. codominance C. incomplete dominance • True/false: A blood has the genotypes AA and AO. • True/false: fathers can pass sex linked traits like color blindness on to their sons.

  11. Activator#10/31, 11/01In snakes, slithering is dominant over scooting and having a forked tongue is dominant over rounded tongues. Predict the outcome of tongue shape and movement when 2 individuals with the following genotypes combine.SsFf x SsFf

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