In mice, black color (B) is dominant to white (b). On different homologous chromosomes, a dominant allele (A) produces a band of yellow just below the tip of each hair in mice with black fur. This gives a frosted appearance known as agouti. Expression of the recessive allele (a) results in a solid coat color. If mice that are heterozygous at both locations are crossed, what is the expected phenotypic ratio of their offspring? Use the rules of probability instead of a huge Punnett square

In mice, black color (B) is dominant to white (b). On different homologous chromosomes, a dominant allele (A) produces a band of yellow just below the tip of each hair in mice with black fur. This gives a frosted appearance known as agouti. Expression of the recessive allele (a) results in a solid coat color. If mice that are heterozygous at both locations are crossed, what is the expected phenotypic ratio of their offspring? Use the rules of probability instead of a huge Punnett square

Name: In mice, black color (B) is dominant to white (b). On different homolo
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Description: In mice, black color (B) is dominant to white (b). On different homologous chromosomes, a dominant allele (A) produces a band of yellow just below the tip of each hair in mice with black fur. This gives a frosted appearance known as agouti. Expressio

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter20: Chromosomes And Human Genetics

Section: Chapter Questions

Problem 7CT: The following pedigree shows the pattern of inheritance of red-green color blindness in a family....

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The following pedigree shows the pattern of inheritance of red-green color blindness in a family. Females are shown as circles and males as squares; the squares or circles of individuals affected by the trait are filled in black. What is the chance that a son of the third-generation female indicated by the arrow will be color blind if the father is not color blind? If he is color blind?
Mouse fur color is affected by TWO unlinked loci. GG or Gg mice are agouti. Mice with genotype gg are albino since all pigment production is blocked, regardless of the phenotype at the second locus. At the other locus, the F allele (agouti coat) is dominant to the f allele (black coat). How many black mice would result from a cross between two agouti mice of genotype GgFf? (just write in the numeral)
Pigment in mouse fur is only produced when the C allele is present. Individuals of the cc genotype are white. If color is present, it may be determined by the A, a alleles. AA or Aa results in agouti color, while aa results in black coats. (a) What F1 and F2 genotypic and phenotypic ratios are obtained from a cross between AACC and aacc mice? (b) In three crosses between agouti females whose genotypes were unknown and males of the aacc genotype, the following phenotypic ratios were obtained: (1) 8 agouti (2) 9 agouti (3) 4 agouti 8 white 10 black 5 black 10 white What are the genotypes of these female parents?
Two autosomal genes controlling beak shape in finches are 18 cM apart on the same chromosome. Pointy beaks (P) are dominant to round beaks (p), and narrow beaks (N) are dominant to wide beaks (n). If you cross two finches with the allelic configurations PN/pn (first parent) and Pn/pN (second parent), what is the likelihood their offspring will have round, narrow beaks? I. Which of the following is true for the first parent's gametes? a) PpNn is a non-crossover gamete b) the frequency of the gamete pn is 0.41 c) the frequency of the gamete Pn is 0.41 d) PN is a cross over gamete e) the frequency of the gamete Ppnn is 0.5 2. Which of the following is true for the second parent's gametes a) PN is a cross over gamete b) PpNn is a non-crossover gamete c) the frequency of the gamete pn is 0.41 d) the frequency of the gamete PpNn is 0.82 e) the frequency of the gamete Pn is 0.09 3. What is the target genotype? Group of answer choices a)ppN_ b)ppNn c)P_nn d)P_N_ e)Ppnn 4. What…
The production of purple pigment in a certain species of flower is dependent upon two gene loci. You cross two purple flowered plants that are heterozygous at each gene locus. The offspring show the following phenotypes: 91 purple and 68 white.a. What is the simplified phenotypic ratio is observed in the offspring? What mode of inheritance is associated with this ratio? b. What is/are the genotype(s) of the purple offspring? What is/are the genotype(s) of the white offspring?
In guinea pigs, rough coat (R) is dominant to smooth coat (r). If a homozygous rough-coated animal is crossed with a smooth-coated one: What will be the phenotype(s) of the F1 generation? What will be the phenotype(s) of the F2 generation? What will be the phenotype(s) of the offspring resulting from a cross of an F1 individual back to its rough parent? What will be the phenotype(s) of the offspring of a cross of an F1 individual back to its smooth parent?
The long hair of Persian cats is recessive to the short hair of Siamese cats, but the black coat color of Persians is dominant to the brown-and-tan coat color of Siamese. Make up appropriate symbols for the alleles of these two unlinked loci. If a pure black, long-haired Persian is mated to a pure brown-and-tan, short-haired Siamese, what will be the appearance of the F1 offspring? If two of these F1 cats are mated, what is the chance that a long-haired, brown-andtan cat will be produced in the F2 generation? (Use the shortcut probability method to obtain your answer; then check it with a Punnett square.)
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In owl, barring (B) is sex-linked and dominant, the recessive allele (b) producing solid black color when homozygous. Silky feathers (s) is a recessive autosomal gene, as opposed to non-silky (S). If black cocks, heterozygous for non-silky, are crossed to barred, silky hens, what genotypes and phenotypes will be produced? (Sex linked genes can be written as XAXA for female and XAY for male since superscript function are not available) what is the genotype of the cock? What are the possible genotypes of the hen? Write the genotypes of the F1 when the hen is homozygous dominant for barring What is the phenotypic ratio? What is the genotypic ratio when the hen is heterozygous for barring? How many female carriers are present when the hen is heterozygous for barring? (use fraction)
Two recessive traits in mice—droopy ears and flaky tail—arecaused by genes that are located 6 mu apart on the same chromosome.A true-breeding mouse with normal ears (De) and a flaky tail ( ft)was crossed to a true-breeding mouse with droopy ears (de) and anormal tail (Ft). The F1 offspring were then crossed to mice withdroopy ears and flaky tails. If this testcross produced 100 offspring,what is the expected outcome of phenotypes?
In rats, hair color is either gray (G), black (g), or white. The white color is produced due to an epistatic recessive allele of gene "a". In other words, in order for the black or gray color to show up, the rat must have at least one dominant (A) epistatic allele. Two heterozygous Gray rats are crossed. Both rats are also heterozygous for the epistatic gene. Predict the probability that an offspring of this cross will: a. Express the gray phenotype b. Express the black phenotype c. Express the white phenotype
Two recessive traits in mice—droopy ears and flaky tail—arecaused by genes that are located 6 mu apart on the same chromosome.A true-breeding mouse with normal ears (De) and a flaky tail ( ft)was crossed to a true-breeding mouse with droopy ears (de) and anormal tail (Ft). The F1 offspring were then crossed to mice withdroopy ears and flaky tails. If this testcross produced 100 offspring,What information do you know based on the question and your understanding of the topic?