4) In tomatoes, round shape (R) is dominant to pear shape (r). A student crossed a plant that had round tomatoes with a plant that had pear-shaped tomatoes and obtained the data below. What are the genotypes of the plants that were crossed. Briefly explain your answer. Phenotype Number of Offspring Round tomatoes 36 Pear-shaped tomatoes 34

4) In tomatoes, round shape (R) is dominant to pear shape (r). A student crossed a plant that had round tomatoes with a plant that had pear-shaped tomatoes and obtained the data below. What are the genotypes of the plants that were crossed. Briefly explain your answer. Phenotype Number of Offspring Round tomatoes 36 Pear-shaped tomatoes 34

Name: 4) In tomatoes, round shape (R) is dominant to pear shape (r). A stud
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Description: 4) In tomatoes, round shape (R) is dominant to pear shape (r). A student crossed a plant that hadround tomatoes with a plant that had pear-shaped tomatoes and obtained the data below. Whatare the genotypes of the plants that were crossed. Briefly ex

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

Section12.1: The Beginnings Of Genetics: Mendel’s Garden Peas

Problem 1SB: Two pairs of traits are segregating in a cross. Two parents produce 156 progeny that fall into 4...

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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. A gardener finds that some bean plants have pubescent leaves and others have glabrous leaves. a. Based on the results of the following crosses below, which trait is dominant, pubescent or glabrous? Which of the following crosses helped you determine the answer? b. Based on your answer in 1.a, determine the genotypes of the parents of each cross.
1. A woman who is heterozygous for the brown eye and blue eye alleles marries a man with blue eyes. What are the genotypes and phenotypes of the children? a) What is the genotypic ratio of the above cross (Write number next to genotype)? ___________________________________________________________________ b) What is the phenotypic ratio of the above cross? (Write number next to phenotype)? ___________________________________________________________________
2. You cross a pure-breeding red guinea pig with short hair and a pure-breeding white guinea pig with long hair. Allof the offspring are long hair and cream colored.a. What type of inheritance is hair length? Hair color? How do you know?b. What are the genotypes of the parents?c. Determine the genotypes and phenotypes and how many are expected for the F2 generation. (Just leaveyour answers as a list with numbers beside them. No ratios required.)
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)
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.…
In goats, black fur is dominant to red fur. The gene for this trait can be described as Bb (if you forgot why this is so, go back and reread the background information at the beginning of this exercise). A homozygous black female goat (nanny) is crossed with a heterozygous male (billy). 1 What is the genotype of the nanny? Fill input: What is the phenotype of the nanny?
In snapdragons, red flower color (R) is incompletely dominant over white flower color (r). The hybrids or heterozygous plants (Rr) are pink in color. a) Show the genotype for a white flower and for a red flower. b) If a red-flowered plant is crossed with a white-flowered plant, what are the genotypes and phenotypes of the F1 generation plants? c) What genotypes and phenotypes will be produced in the F2 generation? d) How did the genotypic and phenotypic ratio compare to each other in this incomplete dominance cross? e) What would the phenotypic ratio have been if this had been complete dominance? f) What kind of offspring can be produced if a red-flowered plant is crossed with a pink-flowered plant? g) What kind of offspring is/are produced if a pink-flowered plant is crossed with a white-flowered plant?
Rabbits may be classified as agouti, chinchilla, Himalayan, or albino according to coat color. A cross between CC h x C ch c produced 5 agouti, 3 chinchilla and 2 Himalayans. d. If the two F1 agouti genotypes will be crossed, what percentage of theiroffspring will have the same phenotype? e. What will be the genotypes of the rabbits in (d)?
Scenario A In goats, black fur is dominant to red fur. The gene for this trait can be described as Bb (if you forgot why this is so, go back and reread the background information at the beginning of this exercise). A homozygous black female goat (nanny) is crossed with a heterozygous male (billy). 1 What is the genotype of the nanny? What is the phenotype of the nanny?
b) You test cross an F1 fish (with genotype BbCc) and obtain 1000 offsprings in F2 generation with the following results: 474 Bbcc, 480 bbCc, 20 BbCc and 26 bbcc.1. Create and fill in a Punnet square for this cross.2. What type of cross is it? 3. Are these loci linked? 4. What are the two parental classes and the two recombinant classes of offspring? 5. What is the percentage of recombination between these two loci? Show your calculations. 6. How many map units apart are they?
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…