Essentials of Genetics (9th Edition) - Standalone book
9th Edition
ISBN: 9780134047799
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino
Publisher: PEARSON
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Chapter 4, Problem 20PDQ
In cattle, coats may be solid white, solid black, or black-and- white spotted. When true-breeding solid whites are mated with true-breeding solid blacks, the F1 generation consists of all solid white individuals. After many F1
12/16 solid white
3/16 black-and-white spotted
1/16 solid black
Explain the mode of inheritance governing coat color by determining how many gene pairs are involved and which genotypesyield which
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In dogs, black (B) is dominant over brown (b) color. What would be the color of the puppies if a purebred black dog is crossed with a purebred brown dog? What would be the phenotypic ratio of the F1 offspring? Show a punnet square for this cross
In radishes, flower colors may be red, purple, or white. The edible portion of the radish may be long or oval. When only flower color is studied, no dominance is evident, and red 3 white crosses yield all purple. If these F1 purples are interbred, the F2 generation consists of 1/4 red: 1/2 purple: 1/4 white. Regarding radish shape, long is dominant to oval in a normal Mendelian fashion.
a. Determine the F1 and F2 phenotypes from a cross between a true-breeding red, long radish, and a radish that is white and oval. Be sure to define all gene symbols at the start.
b. A red oval plant was crossed with a plant of unknown genotype and phenotype, yielding the following offspring:103 red long: 101 red oval98 purple long: 100 purple oval
Determine the genotype and phenotype of the unknown plant.
In guinea pigs, black fur is dominant over brown fur, and short hair is dominant over long hair. These traits follow Mendelian inheritance. Suppose a homozygous short black hair is mated with a homozygous long brown haired rabbit, determine the phenotypic ratio of the following: F1 generation; F2 generation; F1 mated with a short brown haired rabbit.
Gene Notation: B - hair color , S - hair length
Chapter 4 Solutions
Essentials of Genetics (9th Edition) - Standalone book
Ch. 4 - CASE STUDY | But he isn't deaf Researching their...Ch. 4 -
CASE STUDY | But he isn’t deaf
Researching...Ch. 4 - CASE STUDY | But he isn't deaf Researching their...Ch. 4 - HOW DO WE KNOW? In this chapter, we focused on...Ch. 4 - Review the Chapter Concepts list on page 53. These...Ch. 4 - In Shorthorn cattle, coat color may be red, white,...Ch. 4 -
4. With regard to the ABO blood types in humans,...Ch. 4 - In foxes, two alleles of a single gene, P and p,...Ch. 4 - Three gene pairs located on separate autosomes...Ch. 4 - As in the plants of Problem 6, color may be red,...
Ch. 4 -
8. The following genotypes of two independently...Ch. 4 - Given the inheritance pattern of coat color in...Ch. 4 - A husband and wife have normal vision, although...Ch. 4 - In humans, the ABO blood type is under the control...Ch. 4 - In goals, development of the beard is due to a...Ch. 4 -
13. In cats, orange coal color is determined by...Ch. 4 - In Drosophila, an X-linked recessive mutation,...Ch. 4 - Another recessive mutation in Drosophila, ebony...Ch. 4 - While vermilion is X-linked in Drosophila and...Ch. 4 - In pigs, coat color may be sandy, red, or white. A...Ch. 4 - A geneticist from an alien planet that prohibits...Ch. 4 - In another cross, the frog geneticist from Problem...Ch. 4 - In cattle, coats may be solid white, solid black,...Ch. 4 - Consider the following three pedigrees, all...Ch. 4 - Labrador retrievers may be black, brown, or golden...Ch. 4 - Three autosomal recessive mutations in Drosophila,...Ch. 4 -
24. Horses can be cremello (a light cream...Ch. 4 - Pigment in the mouse is produced only when the C...Ch. 4 - Five human matings numbered 1–5 are shown in the...Ch. 4 - Two mothers give birth to sons at the same time at...Ch. 4 - In Dexter and Kerry cattle, animals may be polled...Ch. 4 - What genetic criteria distinguish a case of...Ch. 4 -
30. The specification of the anterior-posterior...Ch. 4 - The maternal-effect mutation bicoid(bcd)is...Ch. 4 -
32. Students taking a genetics exam were...Ch. 4 - In four o'clock plants, many flower colors are...Ch. 4 - Prob. 34PDQ
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- In dogs, wire-haired (S) is dominant to smooth-haired (s). 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 genotypic ratio and phenotypic ratio?arrow_forwardIn 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?arrow_forwardIn British cattle, those with long legs are called Kerry and others with extremely shortened legs are called Dexter. When Kerry cattle are crossed, their progeny have only the Kerry phenotype. When Dexter cattle are crossed with Kerry cattle, they produce Kerry and Dexter phenotypes in a 1:1 ratio. When Dexter are crossed with Dexter, 1/4 of the offspring are Kerry, 2/4 are Dexter, and 1/4 are born dead with very short legs and nose (bulldog phenotype). Interpret the genetics of the Kerry and Dexter phenotypes.arrow_forward
- In a cross of Bbee yellow labrador retreiver with a bbEe brown labrador retreiver, what are the expected color ratios for the offspring? 1/4 black, 1/4 brown, 1/2 yellow 1/2 black, 1/4 yellow, 1/4 brown 1/2 black, 1/2 yellow 1/2 brown, 1/2 yellowarrow_forwardIn cats, coat color is determined by allelic variation at a single autosomal locus, with black fur dominant to white fur. Two heterozygous black cats are mated. What would be the probability of the following combinations of offspring in a litter of eight kittens? The firstborn kitten with white fur, and among the remaining seven kittens, three with black fur and four with white fur.arrow_forwardGregor 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 - 1/16arrow_forward
- In oats, the color of the chaff is determined by a two-gene interaction. When a true-breeding black chaff plant was crossed to a truebreeding white chaff plant, the F1 generation was composed of allblack chaff plants. When the F1 offspring were crossed to eachother, the ratio produced was 12 black to 3 gray to 1 white. First,construct a Punnett square that accounts for this pattern of inheritance. Which genotypes produce the gray chaff phenotype? Second,at the level of protein function, how would you explain this type ofinheritance?arrow_forwardCows have codominance inheritance rules for their coat color. Cows with the genotype BB are completely black, those with the genotype WW are completely white, and with genotype BW have black and white spots across their body. Draw a Punnett Square that shows the genotypes and phenotypes of the offspring from a heterozygous coated cow and a homozygous white coated cow? Indicate also the genotypic and phenotypic % below:\arrow_forwardThere is a lack of dominance in black and white horse coat colours. An offspring produced from a black horse and a white horse has a blue-roan coat colour. When the blue-roan coat is closely examined, both black and white hair can be found. A black horse mated with a blue roan horse. Which of the following alternatives correctly identifies the phenotypic ratio of the offspring? Select one: a. 1 BB : 1 BW b. 1 white : 1 black c. 1 black : 1 blue roan d. 1 WW : 1 BBarrow_forward
- Dihybrid and trihybrid Cross Get the genotypic and phenotypic ratio of the following: Dihybrid cross: Harry has 1 pair of dog, he's going to breed his Pure black, furry male to his white furless female (P generation). Also, he wants to find out what will be the result if he breed 2 offspring from F1 generation. Help him to predict the P and G ratio of F1 and F2 generation using the Punnett Square. Dominant Recessive Black White Furry Furless Trihybrid cross: Breed AaBbCc to another AaBbCc.arrow_forwardFur color is codominant in cows. A roan cow has a fur color of orange and white. What are the phenotype and genotypic ratios expected if a roan male and a roan female breed together?arrow_forwardIn incomplete dominance inheritance, a snapdragon plant that is homozygous for red flowers is crossed with a snapdragon plant that is homozygous for white flowers. What is the probability (%) that the offspring will have red flowers?arrow_forward
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