Human Biology (MindTap Course List)
11th Edition
ISBN: 9781305112100
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Chapter 19, Problem 6CT
The ABO blood system has been used to settle cases of disputed paternity. Suppose, as a geneticist, you must testify during a case in which the mother has type A blood, the child has type O blood, and the alleged father has type B blood. How would you respond to the following statements?
- a. Man’s attorney: “The mother has type A blood, so the child’s type O blood must have come from the father. Because my client has type B blood, he could not be the father.”
- b. Mother’s attorney: “Further tests prove this man is heterozygous, so he must be the father.”
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Last year, a young woman sued film star/director, Mr. Wensley, for parental support of her illegitimate child. Mr. Wensley’s blood type was already on record as type AB. The mother of the child had type A and her son had type O blood.
a.1. Complete a Punnett square for the possible cross of Mr. Wensley and the mother of the baby.
a.2. The judge ruled in favor of the mother and ordered Mr. Wensley to pay child support costs of the child. Was the judge correct in his decision based on blood typing evidence? Explain why or why not.
Show any Punnett squares to support your answer.
Blood types A and B are codominant, O is recessive. Rh factor is determined by a different gene. The allele for a positive Rh factor is dominant over the allele for a negative Rh factor. Based on this information, can a person with O+ blood have two parents with O- blood? Explain
7. Part II - Based on your results, what information could you provide the court that may be helpful in the case. (Show your analysis (Punnett squares) for determining who the father is.)
On a recent episode of CSI, multiple people came forward claiming to be parents of a crime victim. For the first set of parents, the man has Type AB blood while the woman has Type O blood and the victim has Type B blood. Use the Punnett square and determine if it is possible for these people to be the true parents of the victim.
A. Could these be the parents? __________
B. From the list below, circle each of those options which could be parents of the victim.
Couple Blood Typesa) Bob & Gina Type O and Type Ob) Ted & Susan Type AB and Type ABc) Rob & Kelly Type A and Type Ad) Tricia & James Type A and Type B
Chapter 19 Solutions
Human Biology (MindTap Course List)
Ch. 19 - Define the difference between (a) gene and allele,...Ch. 19 - Prob. 2RQCh. 19 - What is probability, and how is it applied in...Ch. 19 - What is independent assortment? Does independent...Ch. 19 - Alleles are ___________. a. alternate forms of a...Ch. 19 - A heterozygote has _____. a. only one of the...Ch. 19 - Prob. 3SQCh. 19 - Offspring of a cross AA aa are ______. a. all AA...Ch. 19 - Prob. 5SQCh. 19 - Prob. 6SQ
Ch. 19 - Which statement best fits the principle of...Ch. 19 - Prob. 8SQCh. 19 - Prob. 9SQCh. 19 - Prob. 10SQCh. 19 - One gene has alleles A and a. Another has alleles...Ch. 19 - Still referring to Problem 1, what will be the...Ch. 19 - Go back to Problem 1, and assume you now study a...Ch. 19 - The young woman shown at right has albinismvery...Ch. 19 - When you decide to breed your Labrador retriever...Ch. 19 - The ABO blood system has been used to settle cases...Ch. 19 - Prob. 7CTCh. 19 - A man is homozygous dominant for ten different...Ch. 19 - Prob. 9CTCh. 19 - Bill and Marie each have flat feet, long...Ch. 19 - You decide to breed a pair of guinea pigs, one...
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