Biology
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?
