Incomplete and co dominance ppt
- 1. Incomplete Dominance: The heterozygous genotype produces a phenoytype that falls in between the dominant trait and the recessive trait. Incomplete Dominance
- 2. Example: In flowers, petal color demonstrates incomplete dominance. Red results when a flower has homozygous dominant alleles for the trait. White results when a flower has homozygous recessive alleles for the trait. A flower that is heterozygous for this trait will be pink. Predict the genotypic and phenotypic ratios of the offspring for the following: Genotypic Ratio: Phenotypic Ratio: 1. Red and white ______ x _______
- 3. Example: Red results when a flower has homozygous dominant A flower that is heterozygous for this trait will be pink. Predict the genotypic and phenotypic ratios of the offspring for the following: Genotypic Ratio: Phenotypic Ratio: 2. Red and pink _______ x ________
- 4. Genotypic Ratio: Phenotypic Ratio: Genotypic Ratio: Phenotypic Ratio: White and Pink Pink and Pink
- 5. Codominance Codominance: condition in which both alleles of a gene are expressed in heterozygous offspring.
- 6. Example 1: In cows black coat color and white coat color are codominant. Heterozygous offspring will be spotted. 1. Black cow and White cow ______ x ______ Genotypic Ratio: Phenotypic Ratio:
- 7. . 2. Black cow and Spotted cow _______ x ______ Genotypic Ratio: Phenotypic Ratio:
- 8. Example 1: 3. Both Spotted cows ______x ________ Genotypic Ratio: Phenotypic Ratio:
- 9. Example 2: In blood typing, the gene for type A (IA ) and the gene for type B (IB ) are codominant. The gene for type O is recessive (ii). Genotypes are written IB or IA or i Blood Type (phenotype) Genotype A IAIA or IAi B IBIB or IBi AB IAIB O ii
- 10. Determine the possible blood types of the offspring when: 1. Mother is type O (ii), Father is type A (IA IA) (homozygous) Genotypic Ratio: Phenotypic Ratio:
- 11. Determine the possible blood types of the offspring when: Genotypic Ratio: Phenotypic Ratio: 2. Mother is type AB, Father is Type A (heterozygous)