The ABO blood groups in humans are determined by a multiple allelic system in which A and B are codominant and are dominant to 0. If an infant born to a type O mother also is type O, possible genotypes for the father are

Blood types in humans are caused by a combination of two of three possible alleles - IA, IB, and i. The i allele is recessive and individuals homozygous for this allele have blood types O.  Blood type A may be due to either homozygous condition or the IA i   Blood type AB is caused by having a copy of both the IA and IB alleles.  Rh factor is another “marker” on human red blood cells and is either positive (dominant—RR or Rr) or negative (recessive—rr). Franks has blood type A-negative. Frank’s father is B-positive and his mother is AB-positive. Frank marries Susan, a woman that is B-positive.  Susan’s mother is A-negative and her father is AB-positive.  Give the genotype of all of the individuals mentioned above.   b. Give the genotypes and phenotypes of the possible offspring from this marriage

Please give the expected genotypic and phenotypic ratio of offspring from a cross between a person with Type AB blood and a person with Type O blood.

In humans, blood type AB is a codominant trait.  Suppose Jim has blood type AB (IAIB) and his wife has blood type O (ii).  What are the possible genotypes and blood types of their children?

what fraction of the offspring of two parents with sickle trait would you expect to have sickle cell anemia? Explain how you arrived at this answer. Also include a punnet square

Is it possible for any sonof a couple formed by ahemophilic man (XhY) and anonhemophilic noncarrier(XX) woman to be hemophilic?

A couple with the following blood types: the man has type AB and the woman has type B, discover their child has type O blood.    Is it possible that one of these ‘parents’ may not actually be the genetic parent of this child?  If so, which one, and how do you know?

Sickle cell anemia is caused by an individual carrying two recessive copies of the hemoglobin gene (hemoglobin gene is labeled Hb, and the recessive version is Hbs). Thus, to have sickle cell anemia, a person must have the genotype HbSHbS. A person that is HbAHbA carries two copies of the normal hemoglobin gene and does not have sickle cell anemia. A person that is heterozygous (HbAHbS) produces enough normal hemoglobin to not have sickle cell anemia but is also resistant to malaria. People that are heterozygous are called “carriers” because they carry the recessive allele but do not express the recessive phenotype. a. A couple are both resistant to malaria but do not have sickle cell anemia. Draw a Punnett square to represent this cross. b. What is the probability that the couple has three children where one child does not have a recessive allele, one child is resistant to malaria and does not have sickle cell anemia, and one child has sickle cell anemia?

A woman with type B blood has a child with type O blood. Whatare the possible genotypes and blood types of the father?

In a parental cross for an autosomal MOI, the ratio (Disease phenotype):(WT phenotype) differ for the scenarios: (i) the father is affected and mother is unaffected; and (ii) the mother is affected and the father is unaffected.  a) true  b) false