Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 14, Problem 3GP
Human females have two X chromosomes (XX); males have one X and one Y chromosome (XY).
- a. With respect to X-linked alleles, how many different types of gametes can a male produce?
- b. If a female is homozygous for an X-linked allele, how many types of gametes can she produce with respect to that allele?
- c. If a female is heterozygous for an X-linked allele, how many types of gametes can she produce with respect to that allele?
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Human females have two X chromosomes (XX); males have one X and one Y chromosome (XY). a. With respect to X chromosome alleles, how many different types of gametes can a male produce? b. If a female is homozygous for an allele on an X chromosome, how many types of gametes can she produce with respect to that allele? c. If a female is heterozygous for an X chromosome allele, how many types of gametes can she produce with respect to that allele?
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Chapter 14 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 14 - Constructing a pedigree is particularly useful...Ch. 14 - Prob. 2SQCh. 14 - Prob. 3SQCh. 14 - Prob. 4SQCh. 14 - Prob. 5SQCh. 14 - A trait that is present in a male child but not in...Ch. 14 - Color blindness is a case of ______ inheritance....Ch. 14 - A female child inherits one X chromosome from her...Ch. 14 - Prob. 1DAACh. 14 - Prob. 2DAA
Ch. 14 - Prob. 3DAACh. 14 - Prob. 9SQCh. 14 - Expression of the SRY gene on the Y chromosome...Ch. 14 - Prob. 11SQCh. 14 - Prob. 12SQCh. 14 - Prob. 13SQCh. 14 - Prob. 14SQCh. 14 - Match the chromosome terms appropriately. ____...Ch. 14 - Prob. 1GPCh. 14 - Does the phenotype indicated by the red circles...Ch. 14 - Human females have two X chromosomes (XX); males...Ch. 14 - A mutated allele responsible for Marfan syndrome...Ch. 14 - The somatic cells of most individuals with Down...Ch. 14 - Mutations in the genes for clotting factor VIII...
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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
- Human sex chromosomes are XX for females and XY for males. a. With respect to an X-linked gene, how many different types of gametes can a male produce? b. If a female is homozygous for an X-linked allele, how many different types of gametes can she produce with respect to this allele? c. If a female is heterozygous for an X-linked allele, how many different types of gametes can she produce with respect to this allele?arrow_forwardButterflies have an X-Y sex-determination system that is different from that of flies or humans. Female butterflies may be either XY or X0, while butterflies with two or more X chromosomes are males. This photograph shows a tiger swallowtail gynandromorph, which is half male (left side) and half female (right side). Given that the first division of the zygote divides the embryo into the future right and left halves of the butterfly, propose a hypothesis that explains how nondisjunction during the first mitosis might have produced this unusual-looking butterfly. Question is also in the picture.arrow_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_forwardMendel's observation of the random distribution of two different traits from parents to offspring (giving the 9:3:3:1 ratio of phentypes) was due to A. The random and independent way in which each pair of homologous chromosomes lines up at the metaphase plate during meiosis I. B. The random nature of the fertilization of ova by sperm. C. The random distribution of the sister chromatids to the two daughter cells during anaphase II. D. The relatively small degree of homology shared by the X and Y chromosomes.arrow_forwardTwo tetrahybrids (AaBbCcDd) were crossed. a. What is the probability of having sperm cells from the male parent with equal number of dominant and recessive genes? b. What is the probability that the progeny will have at least 1 dominant trait? c. Give complete phenotypic ratio expected from this cross.arrow_forward
- A cross between individuals with the genotypes AaBb and aabb produces 1000 offspring. The aabb class contains 380 individuals. a. Are genes a and b linked? Explain your answer. b. What is the linkage configuration in the heterozygote parent. c. What types of gametes will be formed by the heterozygote parent and in what proportions? Give only the allele compositions of the gametes in brackets and their relative proportions.arrow_forward: In Drosophila, yellow body is due to an X-linked gene that is recessive to the gene forgray body.(a) A homozygous gray female is crossed with a yellow male. The F1 are intercrossed toproduce F2. Give the genotypes and phenotypes, along with the expected proportions, of theF1 and F2 progeny.(b) A yellow female is crossed with a gray male. The F1 are intercrossed to produce the F2.Give the genotypes and phenotypes, along with the expected proportions, of the F1 and F2progeny.(c) A yellow female is crossed with a gray male. The F1 females are backcrossed with graymales. Give the genotypes and phenotypes, along with the expected proportions, of the F2progeny.(d) If the F2 flies in part b mate randomly, what are the expected phenotypic proportions offlies in the F3??arrow_forwardA woman with a rare autosomal recessive disorder was told that it was unlikely that her children would have the disorderas her husband did not have it. However, her first child has the disorder. a. What is the most likely explanation? b. Diagram the cross between the woman and her husband using a Punnett square, give the genotypic ratio (GR) and phenotypic ratio (PR) from the Punnett square. c. Based on the Punnett square results, what is the chance that her next child will have the disorder?arrow_forward
- Let us suppose that two long-winged flies were crossed and that 77 long-winged and 24 short-winged specimens were counted in the offspring. a. Will the short-winged character be dominant or recessive?B. What will the genotypes of the parents be?C. What is the observed genotype ratio?arrow_forwardIn a cross between a homozygous red-eyed female fruit fly and a white-eyed male fruit fly, what is the expected outcomearrow_forwardIn humans, the genes for coloblindedness and hemophilia re both located on the X chromosome with no corresponding gene in the Y. These are both recessive alleles. a. If a man and a woman, both with normal vision, marry and have a colorblind son, draw the Punnet square that illustrates this. b. If the man dies and the woman remarries to a colorblind man, draw a Punnet Square showing the type of children could be expected from hre second marriage. How many/what percentages of each could ne expectedarrow_forward
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