In shorthorn cattle, coat color may be red, white, or roan. Roan is an intermediate phenotype expressed as a mixture of red and white hairs. The following data were obtained from various crosses: red * red ¡ all red white * white ¡ all white red * white ¡ all roan roan * roan ¡ 1/4 red:1/2 roan: 1/4 white How is coat color inherited? What are the genotypes of parents and offspring for each cross?

In shorthorn cattle, coat color may be red, white, or roan. Roan is an intermediate phenotype expressed as a mixture of red and white hairs. The following data were obtained from various crosses: red * red ¡ all red white * white ¡ all white red * white ¡ all roan roan * roan ¡ 1/4 red:1/2 roan: 1/4 white How is coat color inherited? What are the genotypes of parents and offspring for each cross?

Name: In shorthorn cattle, coat color may be red, white, or roan. Roan is an
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Description: In shorthorn cattle, coat color may be red, white, or roan. Roan is an intermediate phenotype expressed as a mixture of red and white hairs. The following data were obtained from various crosses: red * red ¡ all red white * white ¡ all white red * wh

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter5: The Inheritance Of Complex Traits

Section: Chapter Questions

Problem 7QP: Sunflowers with flowers 10 cm in diameter are crossed with a plant that has 20-cm flowers. The F1...

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Sunflowers with flowers 10 cm in diameter are crossed with a plant that has 20-cm flowers. The F1 plants have flowers 15 cm in diameter. In the F2 generation, 4 flowers are 10 cm in diameter and 4 are 20 cm in diameter. Between these are 5 phenotypic classes with diameters intermediate to those at the extremes. a. Assuming that the alleles that contribute to flower diameter act additively, how many genes control flower size in this strain of sunflowers? b. How much does each additive allele contribute to flower diameter? c. What size flower makes up the largest phenotypic class?
Gregor Mendel discovered the basis of heredity with his sweet pea plant experiments. In his studies, he determined that certain traits, such as pod color and pea shape, express complete dominance. A cross occurs between a plant with heterozygous yellow pods and wrinkled peas and a plant with green pods and heterozygous round peas. What is the probability that the offspring will exhibit recessive genes for both traits? A - 1/2B - 1/4C - 1/8D - 1/16
: In poultry, the genotype-phenotype relationships for comb shape are R/– P/–, walnut; R/–p/p, rose, r/r P/–, pea; and r/r p/p, single. What will be the comb characters of the offspring ofthe following crosses?a) A walnut crossed with a single produces offspring that are walnut, rose, pea, and single.b) A rose crossed with a walnut produces offspring that are walnut, rose, pea, and single.c) A rose crossed with a pea produces five walnut and six rose offspring.d) A walnut crossed with a walnut produces one rose, two walnut, and one singleoffspring
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 four-o’clocks, the allele for red flowers is incompletely dominant to the allele for white flowers, so heterozygotes have pink flowers. What ratios of flower colors would you expect among the offspring of the following crosses: (a) pink × pink, (b) white × pink, (c) red × red, (d) red × pink, (e) white × white, and (f) red × white? If you specifically wanted to produce pink flowers, which of these crosses would be most efficient?
In shorthorn cattle, coat color may be red, white, or roan. Roan is an intermediate phenotype expressed as a patches of red and patches of white hairs. The following data are obtained from various crosses: Red x red > all red White x white > all white Red x white > all roan Roan x roan > 25 % red, 50% roan, 25% white From these results, determine the appropriate allele symbols and indicate which genotypes lead to which phenotypes. What are the genotypes of the parents and offspring in each cross above? Predict the results of a red x roan cross. Predict the results of a white x roan cross.
In humans, the genetic disease cystic fibrosis is caused by a recessive allele (a). The normal (healthy) allele is dominant (A). What is the genotype of someone who has cystic fibrosis? What are the two different genotypes that a healthy person could have? If two people were both heterozygous for the cystic fibrosis gene, what fraction of their children would be likely to have this disease? Hint: Draw a Punnett square to figure it out.
When Gregor Mendel performed his breeding experiments on pea plants, he discovered that tallness in the plants is inherited through a simple dominant trait (coded "T") with shortness as the recessive trait (coded "t"). Imagine that Mendel bred a homozygous dominant pea plant with a pea plant heterozygous for tallness. Draw a Punnett Square to help you answer this question and the next one: In the 1st generation of offspring, we expect the genotypes (for tallness) to include… a) 50% homozygous dominant, 50% heterozygous b) 100% heterozygous c) 50% tall, 50% short d) 100% tall e) None of the above
A certain polled bull was bred to three cows. With cow A, which is polled, a horned calf was produced; with cow B, which is polled, a polled calf was produced; and with cow C, which is horned, a polled calf was produced. What are the genotypes of all these four animals [bull, cow A, cow B, and cow C]?
In rabbits, a locus involved in the control of coat colour may be occupied by any of four alleles: Full colour (C), Sepia (ck), Cream (cd), or Albino (ca). A geneticist counted the number of Full colour (C), Sepia (ck), Cream (cd) and Albino coat offspring resulting after crosses between 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 of inheritance? ....show working
Skin color in humans is determined by polygenic inheritance, which means the more dominant alleles there are, the darker the skin color will be. A medium-toned skinned woman (AaBb) has a child with another medium-toned skinned man (AaBb). What is the probability of them having a very dark-toned skinned child? (Hint: the genotype is homozygous dominant)
In dogs, wire-haired (H) is dominant to smooth-haired (h). In a cross of a homozygous wire-haired with a smooth-haired dog, what will be the phenotype of the F1 generation? What would be the genotype? What would be the ratio the wire-haired dogs in the F1 generation? What are the phenotypic and genotypic ratio?