Bundle: Human Biology, Loose-leaf Version, 11th + MindTap Biology, 1 term (6 months) Printed Access Card
11th Edition
ISBN: 9781305616660
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Chapter 20, Problem 5CT
Summary Introduction
To explain: The probability of the first male child of a woman unaffected by hemophilia A but had a father with hemophilia A and marries a man with hemophilia A.
Introduction: Hemophilia A is an X-linked homozygous recessive genetic disorder. Probability in genetics is used to determine the outcome of genotypes of offspring and the probability of its occurrence when parent genotypes are known.
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Chapter 20 Solutions
Bundle: Human Biology, Loose-leaf Version, 11th + MindTap Biology, 1 term (6 months) Printed Access Card
Ch. 20 - Prob. 1RQCh. 20 - What is a carrier of a genetic trait?Ch. 20 - What evidence indicates that a trait is coded by a...Ch. 20 - Prob. 4RQCh. 20 - Explain what nondisjunction is, and give two...Ch. 20 - _______ segregate during ______. a. Homologues;...Ch. 20 - Prob. 2SQCh. 20 - Genes on the same chromosome tend to stay together...Ch. 20 - Prob. 4SQCh. 20 - A chromosomes structure can be altered by _______....
Ch. 20 - Nondisjunction can be caused by ________. a....Ch. 20 - A gamete affected by nondisjunction could have...Ch. 20 - Genetic disorders can be caused by __________. a....Ch. 20 - A person who is a carrier for a genetic trait...Ch. 20 - Prob. 10SQCh. 20 - If a couple has six boys, what is the probability...Ch. 20 - Human sex chromosomes are XX for females and XY...Ch. 20 - People with Down syndrome have an extra copy of...Ch. 20 - Prob. 4CTCh. 20 - Prob. 5CTCh. 20 - About 4 percent of people of Northern European...Ch. 20 - The following pedigree shows the pattern of...
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- What is the form an individual with sickle-cell anemia?arrow_forwardIn humans, as well as with many other animals, sex is determined by special sex chromosomes. An individual containing two X chromosomes is a female, while an individual possessing an X and Y chromosome is a male. he sex chromosomes bear alleles for traits. Sex linkage applies to genes that are located on the sex chromosomes. These genes are considered sex-linked because their expression and inheritance patterns differ between males and females. The genes present on the X chromosome are said to be X linked. Many more genes are present on the X chromosome than found on the Y chromosome. Nonetheless, those genes found on the Y chromosome are said to be Y linked. The Y chromosome is smaller than its homologue, the X chromosome. Consequently, most of the loci present on the X chromosome are absent on the Y chromosome. 1. In humans, hemophilia is a sex linked trait. Females can be normal, carriers, or have the disease. Males will have the disease or not (but they won't be ever carriers) XH…arrow_forwardWhat is the genotype of an individual with PKU?arrow_forward
- What is the Rhesus factor? Explain the complications that may arise from blood incompatibilities.arrow_forwardWhat are the signs of AC genotype?arrow_forwardA normal woman marries a man with sickle-cell trait. What is the probability of their having a (a) child with sickle-cell trait, (b) normal child, (c) child with sickle cell anemia?arrow_forward
- D. Sex-linked In humans, hemophilia is a sex-linked trait. Females can be normal, carriers, or have the disease. Males will either have the disease or not (but they won't ever be carriers). 1. Show the cross of a man who has hemophilia with a normal woman. What is the probability that their children will have the disease? H H = female, normal H h X X = female, carrier h xxn XHY X" Y 2. A woman who is a carrier marries a hemophiliac man. Show the cross. What is the probability that their children will have hemophilia? What sex will a child in the family with hemophilia be? 3. A woman who has hemophilia marries a normal man. How many of their children will have hemophilia, and what is their sex? = female, hemophiliac = male, normal = male, hemophiliacarrow_forwardA parent has type O blood what blood types would his/ her children have and are there any blood types his/her children can't have?arrow_forwardProvide a schematic/diagram of the mehcnaim of anemia.arrow_forward
- What are some clinical features of hemmorhage?arrow_forwardWhich ONE of the following is the most likely clinical presentation of a child with acute lymphoblastic leukaemia? Select one: A.Recent history of easy bruising, pallor and tiredness B.Poor appetite and abdominal pain resulting from swollen spleen C.A 6‐month history of fatigue and repeated upper respiratory tract infection D.Swollen gums in the mouth and red skin nodulesarrow_forwardIf two people with sickle cell traits (AS genotype) have three children, what is the chance that all three children will have homozygous normal RBCs (AA genotype). AA genotype is normal RBCs, AS is heterozygous, and SS is homozygous for sickle cell disease.arrow_forward
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