Campbell Biology: Concepts & Connections, Books a la Carte Plus Mastering Biology with eText -- Access Card Package (8th Edition)
8th Edition
ISBN: 9780133909029
Author: Jane B. Reece, Martha R. Taylor, Eric J. Simon, Jean L. Dickey, Kelly A. Hogan
Publisher: PEARSON
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Chapter 9, Problem 3TYK
Edward was found to be heterozygous (Ss) for sickle-cell trait. The alleles represented by the letters S and s are
a. linked.
b. on homologous chromosomes.
c. both present in each of Edward’s sperm cells.
d. on the same chromosome but far apart.
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Hemophilia is a disease caused by a gene found on the X
chromosome. Therefore, it is referred to as a sex-linked disease.
The recessive allele causes the disease. A man with hemophilia
(xhy) marries a woman who is homozygous dominant (XHXH.
A. Illustrate using a Punnett square the probability that their children
will have the disease.
B. Will any of their children have the disease?
C. Predict the probabilities of their children having the disease.
Edward was found to be heterozygous (Ss) for the sickle-cell trait. The alleles represented by the letters S and s are a. on the X and Y chromosomes. b. linked. c. on homologous chromosomes. d. both present in each of Edward’s sperm cells.
Choose the statement that is incorrect.a. A son can inherit a recessive allele on anX chromosome from either parent.b. An individual may inherit three or more of eachtype of chromosome characteristic of the species, acondition called polyploidy.c. A female child inherits one X chromosome from hermother and one from her father.d. Pedigree analysis can be used to determine a futurechild’s chance of being born with achondroplasia
Chapter 9 Solutions
Campbell Biology: Concepts & Connections, Books a la Carte Plus Mastering Biology with eText -- Access Card Package (8th Edition)
Ch. 9 - Connecting the Concepts 1. Complete this concept...Ch. 9 - Whether an allele is dominant or recessive depends...Ch. 9 - Edward was found to be heterozygous (Ss) for...Ch. 9 - Two fruit flies with eyes of the usual red color...Ch. 9 - A man with type B blood and a woman who has type A...Ch. 9 - Tim and Jan both have freckles (see Module 9.9),...Ch. 9 - Both Tim and Jan (problem 6) have a widows peak...Ch. 9 - In rabbits, black hair depends on a dominant...Ch. 9 - A fruit fly with a gray body and red eyes...Ch. 9 - A series of matings shows that the recombination...
Ch. 9 - A couple are both phenotypically normal, but their...Ch. 9 - Why do more men than women have colorblindness?Ch. 9 - In fruit flies, the genes for wing shape and body...Ch. 9 - Adult height in humans is at least partially...Ch. 9 - Heather was surprised to discover she suffered...Ch. 9 - In 1981, a stray black cat with unusual rounded,...Ch. 9 - SCIENTIFIC THINKING The breakthrough that led...
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- What is the phenotype of a person who has XXXY sex chromosomes? a. Klinefelter syndromeb. Turner syndromec. Poly-X femalearrow_forwardIn humans, hemophilia is an X-linked recessive condition characterized by the inability of blood to clot normally. A woman who is a carrier for hemophilia marries a man who has hemophilia. What are the genotypes of the woman and man, respectively? a. xH+xH+, xH+y b. xH+xH xH+y c. xH+xH xHy Od. XHXH, XH+y O e. xHxH xHyarrow_forwardEarlobes can be attached to the face or non-attached. An attached earlobe is a recessive trait. A female with attached earlobes (Il) has a child with a man with non-attached earlobes. He is heterozygous for this trait. Questions: a. What are the possible genotypes of the egg the woman can produce? b. What are the possible genotypes of the sperm the man can produce? c. What is the genotype ratio for the offspring? d. What is the phenotype ratio for the offspring? e. What is the couple's chance of having a child with attached earlobes?arrow_forward
- Hemophilia is a disease caused by a recessive allele (h), which is found on the X chromosome, non-hemophilia is (H). A normal man marries a woman that is heterozygous for the trait. Give the genotypes and phenotypes of all possible offspring?arrow_forwardWebbed fingers is inherited as an X-linked disease An unaffected male marries an affected female. a. Draw a Punnett square of the possible offspring. b. List the phenotypes of the possible children c. Draw a pedigree that displays the inheritance in you Punnett squarearrow_forwardChoose correct option and do explain. Considering an X-linked dominant trait, if an affected woman and an unaffected man decide to have children, which of the answer choices is possible for their children? a. All of their sons are expected to show the dominant trait. b. Their daughters are expected be heterozygous for the gene. c. Their daughters are not expected to show the dominant trait. d. Their sons are expected to be heterozygous for the gene. e. All their children, whether male or female, are expected to show the dominant trait.arrow_forward
- A heterozygous individual is crossed with a homozygous recessive individual. a. Draw a Punnett square to represent this cross. b. What is the probability that an offspring will have a homozygous genotype? c. What is the probability that an offspring will have a dominant phenotype? d. What is the probability that three offspring will be produced that all carry the recessive allele but do not express the recessive phenotype?arrow_forwardPlease helparrow_forwardIn order for a male to inherit a sex-linked (X-linked) disorder, he must receive the allele from: a. his mother only. b. either his mother or father. c. his father only. d. both his mother and father.arrow_forward
- The discovery of sex-linked traits came from a genetic experiment on flies. A white eyed male fly was discovered. The trait was discovered to be sex-linked recessive. To guarantee that the white eye trait is recessive, he did a cross of XRXr and XrY. Complete the Punnett Square. State the genotypes and phenotypes of the offspring.arrow_forwardin humans brown eyes (B) are dominant over blue (b).A brown eye man marries a blue-eyed woman and they have three children , two of whom are brown eyed and one of whom is blue eyed.Draw the punnett square that illustrate this marrage.what is the man's genotype ? what are the genotype of the children?arrow_forwardThe allele for red feather color in pigeons, R, is dominant to the allele for brown feathers, r. A red pigeon who had a red parent and a brown parent is mated with a brown pigeon.a. Give the genotypes of the two pigeons being mated.b. Identify the gametes produced by each of the pigeons being mated.c. What proportion of the F1 progeny would be expected to have brown feathers?d. If these pigeons produce five progeny, what is the probability that all five will be red?arrow_forward
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