The rare recessive trait of albinism manifests as a lack of pigmentation in the skin. Albinism can be caused by mutations in any of several genes. A female mouse named Blanca exhibits albinism. She mated with two male mice, Ash and Whitey, and produced 3 offspring from each mating. • Ash exhibited albinism; all 3 of Blanca and Ash's offspring showed albinism. Whitey exhibited albinism; none of Blanca and Whitey's offspring showed albinism ● Determine the genotype for the offspring of Blanca and Ash. Capital letters denote wildtype alleles, and lower case letters denote mutant alleles. Mice are diploid. aaBB If Blanca and Ash had a fourth mouse in their litter, what is the probability that the fourth mouse will exhibit albinism? 1.0 Determine the most likely genotype for the offspring of Blanca and Whitey. Capital letters denote wildtype alleles, and lower case letters denote mutant alleles. Mice are diploid. AaBb If Blanca and Whitey had a fourth mouse in their litter, what is the probability that the fourth mouse will exhibit albinism? 0.5 In which mating did complementation occur? Neither

The rare recessive trait of albinism manifests as a lack of pigmentation in the skin. Albinism can be caused by mutations in any of several genes. A female mouse named Blanca exhibits albinism. She mated with two male mice, Ash and Whitey, and produced 3 offspring from each mating. • Ash exhibited albinism; all 3 of Blanca and Ash's offspring showed albinism. Whitey exhibited albinism; none of Blanca and Whitey's offspring showed albinism ● Determine the genotype for the offspring of Blanca and Ash. Capital letters denote wildtype alleles, and lower case letters denote mutant alleles. Mice are diploid. aaBB If Blanca and Ash had a fourth mouse in their litter, what is the probability that the fourth mouse will exhibit albinism? 1.0 Determine the most likely genotype for the offspring of Blanca and Whitey. Capital letters denote wildtype alleles, and lower case letters denote mutant alleles. Mice are diploid. AaBb If Blanca and Whitey had a fourth mouse in their litter, what is the probability that the fourth mouse will exhibit albinism? 0.5 In which mating did complementation occur? Neither

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Description: The rare recessive trait of albinism manifests as a lack of pigmentation in the skin. Albinism can becaused by mutations in any of several genes. A female mouse named Blanca exhibits albinism. Shemated with two male mice, Ash and Whitey, and produce

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter19: Introduction To Genetics

Section: Chapter Questions

Problem 9CT

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In humans, hair color and structure are determined by two independent pairs of genes. The dominant gene T determines dark hair color, and the recessive allele t - light hair; The dominant gene S determines the formation of curly hair, and its recessive allele t - straight hair. What kind of hair will the children have if the mother has light, straight hair, and the father has dark, curly hair (one of the pairs of traits is heterozygous for both parents)?
Two genes, U and H, affect wing development in a species of flying pigs, where some pigs have wings and some do not. Only pigs with the genotype uuhh have wings; pigs of any other genotype do not have wings. Which of the following best describes this scenario? Dominant epistasis of U over H Duplicate dominant epistasis Dominant epistasis of H over U Recessive epistasis of H over U Recessive epistasis of U over H Duplicate recessive epistasis
The inheritance of colour in domestic pigeons involves several genes. The dominance hierarchy of three colour alleles is ash-red > blue-black > brown (ZA > ZB > Zb ).These colours are carried on the Z sex chromosome. Unlike humans, female pigeons have two different sex chromosomes (Z and W) and males have two of the same kind of sex chromosome (ZZ). Which of the following statements is true for sex-linked traits in birds? Select one: a. Females can inherit an allele for a Z-linked trait only from their father, and males can inherit an allele for a Z-linked trait only from their mother. b. Males can inherit an allele for a Z-linked trait only from their mother, and females can inherit an allele for a Z-linked trait from either their mother or father. c. Both sexes can inherit an allele for a Z-linked trait from either their mother or father. d. Females can inherit an allele for a Z-linked trait only from their father, and males can inherit an allele for a Z-linked trait…
In giraffes, long neck is dominant to short neck. Long neck is denoted by the dominant allele, N, while short neck is denoted by a recessive allele, n. Write the genotype and phenotype for the following organisms: homozygous dominant organism, homozygous recessive organism, and heterozygous organism.
In dogs, albino white coat color is an autosomal recessive trait, while black coat is a dominant trait. Homozygous recessive mutations in at least two different genes have been reported to cause white coat color in poodles. A woman owned a purebred albino female poodle. The woman wanted to have more white poodle puppies. She took her dog to a breeder, who promised her to mate the woman’s purebred albino female poodle with a purebred albino stud male. When six puppies were born, all of them were black. The woman sued the breeder, claiming that the breeder failed to breed her poodle with a purebred albino stud male but with a black dog, giving her six unwanted black puppies. You are called in as an expert witness. Based on your knowledge in genetics, which of the following explanations for the case would you consider to be the most reasonable to offer to the court? Question options: To determine if the breeder is innocent, the court needs to separately breed the…
The inheritance of colour in domestic pigeons involves several genes. The dominance hierarchy of three colour alleles is ash-red > blue-black > brown (ZA > ZB > Zb ).These colours are carried on the Z sex chromosome. Unlike humans, female pigeons have two different sex chromosomes (Z and W) and males have two of the same kind of sex chromosome (ZZ). A heterozygous blue-black male pigeon mated with a brown female pigeon. What are the expected genotypes of the offspring? Select one: a. ZAZb, ZBZb, ZBW, and ZAW b. ZBZb, ZbZb, ZBW, and ZbW c. ZBZb and ZbW d. ZBZB,, ZBZb, ZbZb, ZBW, and ZbW
. In tigers, a recessive allele of a particular gene causes both anabsence of fur pigmentation (a white tiger) and a cross-eyed condition. If two phenotypically normal tigers that are heterozygousat this locus are mated, what percentage of their offspring will becross-eyed? What percentage of cross-eyed tigers will be white?
Color blindness is a recessive sex linked disorder among humans. A colorblind man has a child with a woman who is a carrier of the disorder. Given the following genotypes: XN= normal vision and Xn = colorblindness, what is the chance of having colorblind daughters? * 100% 50% 25% 75%
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In Labrador retriever dogs, two alleles (B and b) determine whether coat colour will be black (B)or brown (b). Black coat colour is dominant. A second pair of alleles, E and e, are on a separatechromosome from B and b. The homozygous recessive condition, ee, prevents the expressionof either allele B or b, and produces a dog with a yellow-coloured coat. Some examples ofgenotypes and phenotypes for Labrador retrievers are shown below.Genotype PhenotypeBBEe blackbbEe brownBbee yellow Two dogs, each with the genotype, BbEe, were crossed. What is the percentageprobability that their offspring will have yellow coat colour? (Record your answer as awhole number percentage)
INTERPRET DATA Using the graph in Figure 11-20, determine how many offspring were involved in the hypothetical cross studying skin color. What percentage had the lightest skin possible? the darkest skin possible? Figure 11-20 Polygenic inheritance in human s pigmentation This simplified example assumes that skin pigmentation in humans is governed by alleles of three unlinked loci. The alleles producing dark skin (A, B, and C) are represented by capital letters, but they are not dominant. Instead, their effects are additive. The number of dark dots, each signifying an allele producing dark skin, is counted to determine the phenotype. A wide range of phenotypes is possible when individuals of intermediate phenotype mate and have offspring (AaBbCc AaBbCc). The expected distribution of phenotypes is consistent with the superimposed normal distribution curve.
When you decide to breed your Labrador retriever Molly and sell the puppies, you discover that two of Mollys four siblings have developed a hip disorder that is traceable to the action of a single recessive allele. Molly herself shows no sign of the disorder. If you breed Molly to a male Labrador that does not carry the recessive allele, can you assure a purchaser that the puppies will also be free of the condition? Explain your answer.