In humans people who are homozygous dominant for the sickle

In humans, people who are homozygous dominant for the sickle cell anemia gene produce all normal shaped hemoglobin molecules. Hemoglobin is a protein found in red blood cells that carries oxygen. People who are homozygous recessive produce all abnormally-shaped hemoglobin, which cannot carry oxygen very well. People who are heterozygote\'s produce some normal and some abnormal hemoglobin. If a person who is homozygous dominant for this allele produces children with someone who is heterozygous, will any of their children produce only abnormal hemoglobin? What percentage of their offspring will be homozygous versus heterozygous? Show your work. This problem is an example of what type of inheritance pattern? IV. Monohybrid crosses with multiple alleles Determine whether the following statements about human ABO blood groups are true or false. A child who is type O may have two type A parents A child who is type 0 may have one type AB parent A child who is type B may have two type AB parents A child who is type AB may have one type O parent Mary, who has blood type A, is not sure whether her child was fathered by John or Tom. The child has type B blood. John has blood type 0, and Tom has blood type AB. Can we determine which of these two men is more likely to be the father? If so, show or explain how. Suppose Mary pursues further genetic testing, and discovers that her own genotype is If this is correct, why does It suggest that another mistake was made at some point? Use a Punnett square to support your answer.

Solution

Answer 1

Cross is homozygous dominant (Hb^AHb^A) X (Hb^AHbs)

Now, this cross will produce either homozygous dominant or heterozygous phenotypes. None of the children will have homozygous recessive phenotype; or sickle cell anemia.

Homozygous dominant and heterozygous will be in 1:1.

Inheritance pattern: Codominance

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