Campbell Essential Biology with Physiology (5th Edition)
5th Edition
ISBN: 9780321967671
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece, Kelly A. Hogan
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 11, Problem 15PS
Summary Introduction
To determine: The genotype of sterile male tortoiseshell cats.
Concept introduction:
All humans and other mammals contain sex chromosomes such as XY in males and XX in females. The genes present on the X-chromosome are X-linked genes. The activity of a single X chromosome is normal. The males have this normal dosage, as they have one X chromosome. In females, one X chromosome is inactivated for normal dosage. This is known as X-inactivation.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Although most tortoiseshell cats are female, a litter of kittens will occasionally contain a male tortoiseshell. Which of the following can explain tortoiseshell coat color in a male kitten? Please explain in detail.
The male kitten has an extra Y chromosome
The male kitten has an extra X chromosome
The male kitten has no X chromosome
The male kitten cannot carry out X-inactivation
Sex determination in birds is different from that in humans. The sex chromosomes in birds are called Z and W, because males have two of the same chromosome (ZZ), whereas females have two different chromosomes (ZW). There is a Z-linked allele in some birds that causes the death of the embryo when the normal dominant allele is not present. What would be the sex ratio in the living offspring of a cross between a male heterozygous for the lethal allele and a normal female?
A) What are the genotypes of the parents? Male____ Female____
B) Which gametes would each form? Male____ Female____
C) Draw your Punnett square below and determine the sex ratios of living offspring.
The duck billed platypus is an unusual mammal. If you examine the sex chromosomes of a female platypus you will find a total of 10 X chromosomes. Examining a male platypus finds 5 X chromosomes and 5 Y chromosomes. No other combinations are seen. Each of these five X chromosomes is unique as is each Y chromosome (i.e. X1 pairs only with X1 or Y1, X2 with X2 or Y2 and so on). Why is this unusual? What unusual event must happen during meiosis in a male platypus? (Think carefully about what happens in meiosis 1)
Chapter 11 Solutions
Campbell Essential Biology with Physiology (5th Edition)
Ch. 11 - Your bone cells, muscle cells, and skin cells look...Ch. 11 - A group of prokaryotic genes with related...Ch. 11 - The regulation of gene expression must be more...Ch. 11 - A eukaryotic gene was inserted into the DNA of a...Ch. 11 - How does dense packing of DNA in chromosomes...Ch. 11 - What evidence demonstrates that differentiated...Ch. 11 - The most common procedure for cloning an animal is...Ch. 11 - What is learned from a DNA microarray?Ch. 11 - Which of the following is a substantial difference...Ch. 11 - Prob. 10SQ
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- A fruit fly with a gray body and red eyes (genotype BbPp) is mated with a fly having a black and purple eyes (genotype bbpp). Show diagrammatically a genetic cross between the two flies and the possible genotypes and phenotypes of F1. What ratio of offspring would you expect if the body-colour and eye-colour genes are on different chromosome (unlinked)? When mating is actually carried out, most of the offspring look like the parents, but 3% have a gray body and purple eyes, and 3% have a black body and red eyes. Compare and discuss the observation with your answer in part (arrow_forwardThe genes for the eye-color of fruit flies are located in their X chromosome, or X – linked. (R red-eyed, r white-eyed) A red-eyed female fruit fly is crossed with a white-eyed male fruit fly. What will be the genotype (s) of their offspring?arrow_forwardHumans have two different sex chromosomes, X and Y. Figure 4 below shows the inheritance of sex in humans. Figure 4 Mother Father XX XX Y XY XY a) Copy the diagram into your answer booklet and draw a circle on the part of Figure 4 that shows an egg cell. b) What is the genotype of the male offspring? c) A man and a woman have two sons. The woman is pregnant with a third child. What is the chance that this child will also be a boy?arrow_forward
- A certain type of congenital deafness in humans is caused by a rare autosomal (not X-linked) dominant gene. (a) In a mating involving a deaf man and a deaf woman (both heterozygous), would you expect all the children to be deaf? Explain your answer. (b) In a mating involving a deaf man and a deaf women (both heterozygous), could all the children have normal hearing? Explain your answer. (c) Another form of deafness is caused by a rare autosomal recessive gene. In a mating involving a deaf man and a deaf woman, could some of the children have normal hearing? Explain your answer.arrow_forwardLet’s suppose that a gene affecting pigmentation is found on the Xchromosome (in mammals or insects) or the Z chromosome (in birds)but not on the Y or W chromosome. It is found on an autosome inbees. This gene exists in two alleles: D (dark) is dominant to d (light).What would be the phenotypic results of crosses between true-breedingdark females and true-breeding light males, and the reciprocal crossesinvolving true-breeding light females and true-breeding dark males,in the following species? Refer back to Figures 4.1 and 4.2 for themechanism of sex determination in these species.A. BirdsB. Fruit fliesC. BeesD. Humansarrow_forwardMales of many diploid species (like us) have X and Y sex chromosomes. They are hemizygous for most X- linked genes. Thus, males express most X-linked alleles, whether they are dominant or recessive in females. In the fruit fly Drosophila, it is common to achieve the equivalent of a test cross of X-linked genes in females by assessing the readily observed phenotypes of their male progeny. Since males do not receive X-linked genes from their father, sires of these crosses can be normal or wild-type flies. In fly genetics, it is conventional to name a gene after the mutant phenotype that enabled its discovery. Your challenge is to establish gene order and map distances between three X-linked genes in Drosophila. Each gene is represented by recessive mutant alleles that express rather distinctive phenotypes relative to their dominant wild-type alternative alleles. Flies expressing fruitless (f) are bisexual, lush (1) have a heightened responses to ethanol, and ken&barbie (kb) lack external…arrow_forward
- Consider a couple: a woman who is homozygous for a recessive mutation that causes X-linked colorblindness, and a man with full color vision (he does not carry a copy of the mutation). a) What is the probability that a son of this couple will be colorblind? b) What is the probability that a daughter of the couple will be colorblind?arrow_forwardIn grasshoppers, rosy body color is caused by a recessive mutation; the wild-type body color is green. If the gene for body color is on the X chromosome, what kind of progeny would be obtained from a mating between a homozygous rosy female and a hemizygous wild-type male? (In grasshoppers, females are XX and males are XOarrow_forwardThe X chromosome has a lot of traits for things besides the traits we consider female. It carries traits forthings like the ability of your blood to clot correctly and the ability to see differences in the colors red andgreen. If you blood doesn’t clot correctly, it’s called Hemophilia. If you can’t see the difference betweenred and green, you are colorblind. Therefore, these are referred to as X-Linked or Sex-Linked Traits.Notice that those are on the X chromosome only. That means they are missing from the Y. In fact, the Y iscalled Y because it is physically missing a section at the end. This means the Y chromosome is missing genes that the X chromosome has. If you are XY, you only haveone copy of the gene, or one allele. Given what we just said above, can a XY parent pass a X-Linked Trait to his XY offspring?arrow_forward
- An individual comes into your genetics clinic to be tested for any anomalies. When looking at their karyotype, you notice they have three X chromosomes and a Y chromosome. What information would you be able to relay to this individual? O They have Turner syndrome, are genetically female, and have two Barr bodies per cell. O They have Klinefelter syndrome, are genetically female, and have two Barr bodies per cell. O They have Klinefelter syndrome, are genetically male, and have two Barr bodies per cell. O They have Klinefelter syndrome, are genetically male, and have three Barr bodies per cell. O They have Turner syndrome, are genetically male, and have three Barr bodies per cell.arrow_forwardMules result from a cross between a horse (2 n = 64) and a donkey (2 n = 62), have 63 chromosomes, and are almost always sterile. However, in the summer of 1985, a female mule named Krause who was pastured with a male donkey gave birth to a male foal . Blood tests established that the foal, appropriately named Blue Moon, was the offspring of Krause and that Krause was indeed a mule. Both Blue Moon and Krause were fathered by the same donkey (see the accompanying pedigree). The foal, like his mother, had 63 chromosomes—half of them horse chromosomes and the other half donkey chromosomes. Analyses of genetic markers showed that, remarkably, Blue Moon seemed to have inherited a complete set of horse chromosomes from his mother, instead of the random mixture of horse and donkey chromosomes that would be expected with normal meiosis. Thus, Blue Moon and Krause were not only mother and son, but also brother and sister. Q. Although rare, additional cases of fertile mules giving birth to…arrow_forwardMules result from a cross between a horse (2 n = 64) and a donkey (2 n = 62), have 63 chromosomes, and are almost always sterile. However, in the summer of 1985, a female mule named Krause who was pastured with a male donkey gave birth to a male foal . Blood tests established that the foal, appropriately named Blue Moon, was the offspring of Krause and that Krause was indeed a mule. Both Blue Moon and Krause were fathered by the same donkey (see the accompanying pedigree). The foal, like his mother, had 63 chromosomes—half of them horse chromosomes and the other half donkey chromosomes. Analyses of genetic markers showed that, remarkably, Blue Moon seemed to have inherited a complete set of horse chromosomes from his mother, instead of the random mixture of horse and donkey chromosomes that would be expected with normal meiosis. Thus, Blue Moon and Krause were not only mother and son, but also brother and sister. Q. With the use of a diagram, show how, if Blue Moon inherited only horse…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Human Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage Learning
Human Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning
Human Biology (MindTap Course List)
Biology
ISBN:9781305112100
Author:Cecie Starr, Beverly McMillan
Publisher:Cengage Learning
Human Heredity: Principles and Issues (MindTap Co...
Biology
ISBN:9781305251052
Author:Michael Cummings
Publisher:Cengage Learning
Animal Communication | Ecology & Environment | Biology | FuseSchool; Author: FuseSchool - Global Education;https://www.youtube.com/watch?v=LsMbn3b1Bis;License: Standard Youtube License