ASSIGNMENT
In pea plants, there is a gene that controls the size of the pea plant. The plant can be tall or dwarf (short). Tall plants (T) are dominant to dwarf plants (t).
Complete a Punnett Square of a cross of two plants that are heterozygous for this trait.
What is the resulting genotype ratio of this cross?
What is the resulting phenotype ratio of this cross?
Inheritance of a trait that results in a heterozygous phenotype that is intermediate between the two homozygous phenotypes is called incomplete dominance. In some flowers, flower color is determined by 1 gene with incomplete dominance.
The Allele for red flowers (FR) has incomplete dominance with the allele for white flowers (FW). The heterozygous plants of this species have pink flowers.
What would be the genotype of one of these plants with pink flowers?
What would be the genotype of one of these plants with white flowers?
What would be the genotype of one of these plants with red flowers?
If a plant with red flowers is crossed with a plant with pink flowers: what is the expected genotype and phenotype ratio of the offspring plants children in regards to flower color?
Hemophilia is a recessive X-linked condition. A person with the disease hemophilia has blood that does not clot normally. Normal blood clotting allele (XH) is dominant and the Hemophilia allele (Xh) is recessive. A genetically male parent who has normal blood clotting and a genetically female parent who is heterozygous for hemophilia have children together.
What is the male parent’s genotype?
What is the female parent’s genotype?
Show a Punnet square for the possible offspring from these parents.
What proportion of the genetically male offspring would you expect to have hemophilia given these parents?
What proportion of the genetically female offspring would you expect to have hemophilia given these parents?
Vang has TYPE B blood and is homozygous for this allele. Mai has Type A blood. Mai has a parent with type O blood.
a) What is Vang’s genotype?
b) What is Mai’s genotype?
