Mendel crossed true-breeding plants with wrinkled and green peas to true breeding plants with round and yellow peas. Then he crossed the Fl plants to true-breeding plants with wrinkled, green peas and observed in the progeny 31 plants with round, yellow peas, 26 plants with round, green peas, 27 plants with wrinkled, yellow peas, and 26 with wrinkled, green peas. a) What proportion of these four phenotypes would be expected? b) Calculate the appropriate chi-square and determine if it is consistent with Mendelian expectations (be sure to indicate the probability range).

Mendel crossed true-breeding plants with wrinkled and green peas to true breeding plants with round and yellow peas. Then he crossed the Fl plants to true-breeding plants with wrinkled, green peas and observed in the progeny 31 plants with round, yellow peas, 26 plants with round, green peas, 27 plants with wrinkled, yellow peas, and 26 with wrinkled, green peas. a) What proportion of these four phenotypes would be expected? b) Calculate the appropriate chi-square and determine if it is consistent with Mendelian expectations (be sure to indicate the probability range).

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Description: Mendel crossed true-breeding plants with wrinkled and green peas to true breeding plantswith round and yellow peas. Then he crossed the Fl plants to true-breeding plants withwrinkled, green peas and observed in theprogeny 31 plants with round, yello

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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When Mendel crossed yellow-seeded and green-seeded pea plants, all the offspring were yellow-seeded. When he took these F1 yellow-seeded plants and crossed them to green-seeded plants, what genotypic ratio was expected? What is the name of this type of cross?
Mendel performs a cross using a true-breeding pea plant with round, yellow seeds and a true-breeding pea plant with green, wrinkled seeds. What is the probability that offspring will have green, round seeds? Calculate the probability for the F1 and F2 generations.
In pea plants, smooth peas is dominant to wrinkled peas. When Mendel crossed true breeding smooth peas with true breeding wrinkled peas, what is the genotype of the offspring and what percentage?
Why was it important that Mendel begin with pea plants that he knew bred true for ﬂower color? Why couldn’t he simply cross a purple-ﬂowered plant and a white-ﬂowered plant?
Mendel performed crosses in which he used pollen from a white-flowered plant to fertilize a purple-flowered plant and pollen from a purple-flowered plant to fertilize a white-flowered plant, showing the same results with both. What did these reciprocal crosses demonstrate? A. That the plants were not sterile. B. That there was no epistasis. C. That the trait could be passed from either parent. D. B and C.
What are the four exceptions to Mendelian rules?
A woman with fair skin, blond hair, and blue eyes gives birth to fraternal twins; the father has dark brown skin, dark hair, and brown eyes. One twin has blond hair, brown eyes, and light skin, and the other has dark hair, brown eyes, and dark skin. What Mendelian law does this real-life case illustrate and explain what this means in terms of the inherited alleles for these genes?
. In Figure 2-17, how does the 3:1 ratio in the bottom-lefthand grid differ from the 3:1 ratios obtained by Mendel?
What could be the genotypic and phenotypic ratios for a typical mendelian trait showed in the picture?
In classical Mendelian genetics, how can one check the genotype of a parent (A) expressing the characters of a dominant allele? Select one: a. By performing a back cross with a recessive homozygote parent (B). If the A parent is homozygote for the dominant allele, then all the individuals from the F1 will display the dominant character. If the parent A was, instead, a heterozygote, then 50% of the F1 progeny will express the recessive character (homozygote recessive) and 50% the dominant one (heterozygotes). b. It is impossible to check such genotype without using specific molecular assays. c. By performing a back cross with a dominant homozygote parent (B). If the A parent is homozygote for the dominant allele, then all the individuals from the F1 will display the dominant character.
If mendel crossed heterozygous smooth pea plants with each other, what would be the genotype and phenotype ratio of the offspring?
In a mendelian monohbrid cross which generation is always completely heterozygous?