Human Biology Custom Edition
11th Edition
ISBN: 9781337631532
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Chapter 20, Problem 1CT
If a couple has six boys, what is the probability that a seventh child will be a girl?
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Chapter 20 Solutions
Human Biology Custom Edition
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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- Assume that the ratio of females to males is 1:1. A couple already has two daughters and no sons. If they plan to have a total of six children, what is the probability that they will have four more girls? (a) (b) (c) 116 (d) 132 (e) 164arrow_forwardA couple is both heterozygous for the autosomal recessive disease cystic fibrosis (CF). What is the probability that their first child will either be a girl or have CF but not both?arrow_forwardFree earlobes are dominant to attached earlobes. Two heterozygous individuals plan to have 5 children. What is the probability that the couple has at least 1 child with attached earlobes?arrow_forward
- A pregnant woman is carrying a triplet inside her womb. They want to determine the number of boys or girls she is carrying but the sex of the fetus cannot be determined yet. What is the probability of having a boy and at least a girl? O 3a?b O a°arrow_forwardA boy with cystic fibrosis (a recessive disorder) is born to a couple who appear to be normal. What are the chance (percent or ratio) that any other children born to this couple will also have cystic fibrosis?arrow_forwardFor this pedigree, give the most likely mode of inheritance, assuming that the trait is rare. I || || IV 1 2 123 2 34 1 2 3 4 5 567 4 4 5 6 7 8 9 F 8 12 FOR THE PEDIGREE, WHAT IS THE PROBABILITY THAT III-4 AND III-5 WILL HAVE A BOY AND HE WILL BE AFFECTED?arrow_forward
- A recently married couple are both heterozygous for cystic fibrosis, a recessive genetic disorder. They would like to start a family and would like to have two children. What is the probability that both their first and second child would have cystic fibrosis?arrow_forwardMuscular dystrophy is a group of disorders that involve muscle m weakness and loss of muscle tissue that get worse overtime. A homozygous normal female has children with a male who has muscular dystrophy. What is the probability that they will have a child who is both MALE and HAS MUSCULAR DYSTROPHY?arrow_forwardA man and a woman got married and decided to have 7 children. a. What is the probability that they will have 4 girls and 3 boys? b. What is the probability that all children will be boys? c. What is the probability that all will be girls?arrow_forward
- Assume that the ratio of females to males is 1:1. A couple already has two daughters and no sons. If they plan to have a total of six children, what is the probability that they will have four more girls? (a) ¼ (b) 1/8 (c) 1/16 (d) 1/32 (e) 1/64arrow_forwardThe percentage chance that the mother described above will give birth to a daughter with mid-digital hair and freckles is what percentage?arrow_forwardBob and Joan know from a blood test that they are each heterozygous (carriers) for the autosomal recessive gene that causes sickle cell disease. If their first three children are healthy, what is the probability that their fourth child will have the disease?arrow_forward
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