Complex Patterns of Inheritance 11 2 State Standard
- Slides: 17
Complex Patterns of Inheritance (11. 2) State Standard 2 C. Using Mendel’s laws, explain the role of meiosis in reproductive variability. 2 D. Describe the relationships between changes in DNA and potential appearance of new traits
Chapter 11 Complex Inheritance and Human Heredity 11. 2 Complex Patterns of Inheritance Incomplete Dominance § The heterozygous phenotype is an intermediate phenotype between the two homozygous phenotypes.
Chapter 11 Complex Inheritance and Human Heredity 11. 2 Complex Patterns of Inheritance Codominance § Both alleles are expressed/visible in the heterozygous condition.
Chapter 11 Complex Inheritance and Human Heredity 11. 2 Complex Patterns of Inheritance Sickle-cell Disease Normal red blood cell § Changes in hemoglobin cause red blood cells to change to a sickle shape. § People who are heterozygous for the trait have both normal and sickle-shaped cells. Sickle cell 7766 x
Chapter 11 Complex Inheritance and Human Heredity 11. 2 Complex Patterns of Inheritance Multiple Alleles § Blood groups in humans § ABO blood groups have three forms of alleles. § A & B are codominant § O is recessive
Chapter 11 Complex Inheritance and Human Heredity 11. 2 Complex Patterns of Inheritance Sex Determination § Sex chromosomes determine an individual’s gender.
Chapter 11 Complex Inheritance and Human Heredity 11. 2 Complex Patterns of Inheritance Sex-Linked Traits § Genes located on the sex chromosomes (usually on the x) § Red-green color blindness - X § Hemophilia – X § A male can’t be a carrier of an X-linked trait.
If a man with heterozygous type B blood marries a woman with type AB blood, what is the percent chance of them having a baby with type A blood?
In a situation where dark blue flowers are incompletely dominant over white flowers, predict the outcome of a cross between 2 plants with light blue flowers.
In a certain breed of chickens, brown feathers & grey feathers are codominant. If a brown-feathered chicken is mated with a grey-feathered chicken, predict the genotypic & phenotypic percentage outcomes.