Flower color in the varieties of pea plants studied by Mendel is controlled by alleles at a single locus. A group of peas homozygous for purple flowers is grown. Careful study of the plants reveals that all their flowers are purple, but there is some variation in the intensity of the purple color. What would the estimated heritability be for this variation in flower color? Explain your answer.

Flower color in the varieties of pea plants studied by Mendel is controlled by alleles at a single locus. A group of peas homozygous for purple flowers is grown. Careful study of the plants reveals that all their flowers are purple, but there is some variation in the intensity of the purple color. What would the estimated heritability be for this variation in flower color? Explain your answer.

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Description: Flower color in the varieties of pea plants studied by Mendel is controlled by alleles at a single locus. A group of peas homozygous for purple flowers is grown. Careful study of the plants reveals that all their flowers are purple, but there is some

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter18: Genetics Of Behavior

Section: Chapter Questions

Problem 14QP: A pedigree analysis was performed on the family of a man with schizophrenia. Based on the known...

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Why are monozygotic twins who are reared apart so useful in the calculation of heritability?
Using the example of pea color in Mendel’s pea plants, can you devise equations to determine the allele frequencies of A and a from the genotype frequencies of aa, Aa, and AA?
Imagine that Mendel is tending a garden of 100 pea plants. He has 20 plants that are homozygous for the purple allele, 50 plants that are heterozygous, and 30 plants that are homozygous for the white allele. What is the frequency of the purple (P) allele? What is the frequency of the white (p) allele?
Imagine that Mendel is tending a garden of 100 pea plants. He has 20 plants that are homozygous for the purple allele, 50 plants that are heterozygous, and 30 plants that are homozygous for the white allele. A) What is the frequency of the purple (P) allele? B) What is the frequency of the white (p) allele?
A table is given containing the concordance values for monzygotic and dizygotic twins - Based on this information, which trait has the highest heritability?
In your own words, explain the meaning of the term heritability.Why is a heritability value valid only for a particular population ofindividuals raised in a particular environment?
In summer squash, white fruit color (W) is dominant over yellow fruit color (w) and disk-shaped fruit (D) is dominant over sphere-shaped fruit (d). If a squash plant true-breeding for white, but heterozygous for disk-shape fruit is crossed with a plant which is a dominant carrier for white, but homozygous sphere-shaped fruit. Following Mendel’s laws of heredity, what could be the phenotypic and genotypic proportion of the WwDD in the the first filial generation? a. wDD (heterozygous white with homozygous disk-shaped fruit) is 1% b. WwDD (heterozygous white with homozygous disk-shaped fruit) is 0 % c. WwDD (homozyzygous white with homozygous disk-shaped fruit) is 6.5% d. WwDD (heterozygous white with homozygous disk-shaped fruit) is 12.5 %
In Mendel’s 1866 publication as shown in Figure 1-4, he reports 705 purple-flowered (violet) offspring and 224 white-flowered offspring. The ratio he obtained is 3.15:1 for purple: white. How do you think he explained the fact that the ratio is not exactly 3:1?
Why are monozygotic twins who are reared apart so useful in the calculation of heritability? What assumption is being made about their respective environment?
In a typical one trait experiment of Mendel's, yellow pureline peas (YY) are crossed with green pureline peas (yy). The offspring are yellow. Then, those offspring are selfed. Which statements are / would be true about this experiment?
Gray seed color in peas is dominant to white. Assume that Mendel conducted a series of experiments where plants with gray seeds were crossed with each other and the following progeny were produced: 320 gray and 80 white. (a) What is the most probable genotype of each parent? (b) Based on your answer in (a) above, what genotypic and phenotypic ratios are expected in the progeny?
What could be the genotypic and phenotypic ratios for a typical mendelian trait showed in the picture?