4. J. A. Moore investigated the inheritance of spotting patterns in leopard frogs. The pipiens phenotype had th normal spots that give leopard frogs their name. In contrast, the burnsi phenotype lacked spots on its back. Moore carried out the following cross, producing the progeny indicated. Parent phenotypes burnsi x burnsi Progeny phenotypes 39 burnsi, 6 pipiens a. What are the likely genotypes of the two parents? Be sure to specify the dominant and the recessive trait. b. Use a chi-square test to evaluate the fit of the observed numbers of progeny to the number expected on the basis of your proposed genotypes.

4. J. A. Moore investigated the inheritance of spotting patterns in leopard frogs. The pipiens phenotype had th normal spots that give leopard frogs their name. In contrast, the burnsi phenotype lacked spots on its back. Moore carried out the following cross, producing the progeny indicated. Parent phenotypes burnsi x burnsi Progeny phenotypes 39 burnsi, 6 pipiens a. What are the likely genotypes of the two parents? Be sure to specify the dominant and the recessive trait. b. Use a chi-square test to evaluate the fit of the observed numbers of progeny to the number expected on the basis of your proposed genotypes.

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Description: 4. J. A. Moore investigated the inheritance of spotting patterns in leopard frogs. The pipiens phenotype had thenormal spots that give leopard frogs their name. In contrast, the burnsi phenotype lacked spots on its back.Moore carried out the followi

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter12: Mendel, Genes, And Inheritance

Section: Chapter Questions

Problem 1TYK: The dominant C allele of a gene that controls color in corn produces kernels with color; plants...

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A true-breeding rabbit with agouti (mottled, grayish brown) fur crossed with a true-breeding rabbit with chinchilla (silver) fur produces all agouti offspring. A true-breeding chinchilla rabbit crossed with a true-breeding Himalayan rabbit (white fur with pigmented nose, ears, tail, and legs) produces all chinchilla offspring. A true-breeding Himalayan rabbit crossed with a true-breeding albino rabbit produces all Himalayan offspring. Explain the inheritance of the fur colors.
Two pairs of traits are segregating in a cross. Two parents produce 156 progeny that fall into 4 phenotypes. The numbers of offspring in the 4 phenotypes are 89, 31, 28, and 8. What are the genotypes of the two parents?
The dominant C allele of a gene that controls color in corn produces kernels with color; plants homozygous for a recessive c allele of this gene have colorless or white kernels. What kinds of gametes, and in what proportions, would be produced by the plants in the following crosses? What seed color, and in what proportions, would be expected in the offspring of the crosses? a. CCCc b. Cccc c. CcCc
1) By convention, the recessive trait will determine the abbreviation used to track crosses if it is a mutant condition, since it stands out in contrast to the rest of the population. For example, if pea pods are typically green in color, a mutant condition might result in yellow pea pods; therefore, the lowercase letter ‘y’ would be used to depict the mutant state, yellow, while uppercase ‘Y’ would depict the wildtype (wt) condition, green. Remember that the mutant condition is not necessarily always recessive. 1 A) . If green is dominant wt (Y) and yellow is a recessive mutant condition (y), depict a Yy father mated with a YY mother in the Punnett. 1B) Considering the dominant allele, what colors are the parents in the cross above? Yy = _____________________ YY = _____________________ 1C) What colors are the offspring in the cross above? 1D) What is the phenotypic ratio of the offspring? 1E) What is the genotypic ratio of the offspring? (Remember, the genotypic ratio is based…
7. In guinea pigs, black hair colour (B) is dominant and brown hair colour (b) is recessive. Long hair (L) is dominant and short hair (l) is recessive. Answer the following questions: (a) Diagram the cross: BbLl x BbLL (b) What are the phenotypes of the parent generation? (c) What are the genotypes and phenotypes of the F1 generation?
1. Fur color of rats is determined by the pathway below. The mating between brown rats of identical genotypesproduced the following offspring: 14 cream-colored, 47 Brown, and 19 albino.Gene B Gene DAlbino  Cream  Browna. What type of inheritance is this?b. What is the genotype of the two parents?c. Complete the cross described above. Identify which genotypes are brown, cream, and albino. Includethe expected phenotypic ratio (brown:cream:albino)
7. In rabbits, a locus involved in the control of coat colour may be occupied by any of fouralleles: Full colour (C), Sepia (ck), Cream (cd), or Albino (ca). A geneticist counted the numberof Full colour (C), Sepia (ck), Cream (cd) and Albino coat offspring resulting after crossesbetween Sepia (ck) and Cream (cd) coloured coated parents. The results were as follows.• Full colour (C): 152• Sepia (ck): 53• Cream (cd): 39• Albino (ca): 6Mendelian inheritance of this trait predicts that the ratio of Full colour (C) to Sepia (ck) to Cream(cd) to Albino (ca) should be 9:3:3:1. Do the experimental results support this mode ofinheritance?
8. In guinea pigs, the allele for black fur (B) is dominant over the allele for white fur (b). Similarly, the allele for straight hair (H) is dominant over the allele for having rough hair (h). Pure breeding rough haired guinea pigs with black fur were crossed with pure breeding straight haired guinea pigs with white fur. a. State the genotype and the phenotype of the F1 individuals produced as a result of this cross.b. Two F1 offspring were mated together. Calculate the expected ratio of phenotypes in the F2 generation.c. Show the completed Punnett square below.
1. Alleles of the gene that determines seed coat patternsin lentils can be organized in a dominance series:marbled > spotted = dotted (codominant alleles) >clear. A lentil plant homozygous for the marbled seedcoat pattern allele was crossed to one homozygous forthe spotted pattern allele. In another cross, a homozygous dotted lentil plant was crossed to one homozygous for clear. An F1 plant from the first cross wasthen mated to an F1 plant from the second cross.a. What phenotypes in what proportions are expectedfrom this mating between the two F1 types?b. What are the expected phenotypes of the F1 plantsfrom the two original parental crosses?
1. Hereditary deafness in dalmations (d) is a recessive trait. What percentage of the progeny of crossing DD × Dd will be expected to be a carrier of the deafness allele, but not deaf? (enter a number only) 2.In snapdragons, a flowering plant, red (R) flower colour is dominant to white (r). The heterozygous condition results in pink flower colour. If a two pink flowered snapdragons are crossed, what is the resulting phenotype ratio? Select one: a.2:2 b.1:1:1:1 c.1:2:1 d.3:1 e. (all will be the same)
1. Use the following information to answer the question: Parental cross is RrYy x RrYy Seed Shapes are R-round, r-wrinkled Seed colors are Y-yellow, y-green Based on the information given, what is the phenotype ratio of the offspring of this cross? 2. A pea plant heterozygous for height and seed color (TtYy) is crossed with a pea plant heterozygous for height but homozygous recessive for seed color (Ttyy). If 80 offspring are produced, how many are expected to be tall and have yellow seeds? 3. What is the chromosome theory of inheritance? How does this theory explain Mendel's results? 4. A cross between two organisms heterozygous for two different genes (AaBb) results in a 9:3:3:1 phenotype ratio among the offspring. Is the offspring's genotype ratio the same? Explain your answer.…
1. During his study of the rare Idlewild Lady Slipper (a wild orchid), Dr. Jorge Whiteback discovered several variants of the typical "wild-type" phenotype. He found two varieties of lady slippers at different elevations: a lady slipper variety found in the valley with red flowers and a lady slipper found at higherelevations with white flowers. When Dr. Whiteback did controlled crosses between lady slippers with red flowers and lady slippers with white flowers, all the offspring of this cross had pink flowers. After allowing pinkflowering lady slippers to self-fertilize, the next generation of plants had 112 red flowering plants, 218 pink flowering plants, and 108 white flowering plants.1a) What mode of inheritance would best explain the results of Dr. Whiteback's crosses?b) How many genes and how many different alleles of these gene(s) are determining flower coloraccording to your mode of inheritance?c) Define alleles using the appropriate notation for your answer in (a) and use that…