#29 *29. A dog breeder liked yellow and brown Labradorretrievers. In an attempt to produce yellow and brownpuppies, he mated a yellow Labrador male and abrown Labrador female. Unfortunately, all the puppiesproduced in this cross were black. (See the section"The Complex Genetics of Coat Color in Dogs" inSection 5.2 for a discussion of the genetic basis of coatcolor in Labrador retrievers.)a. Explain this result.b. How might the breeder go about producing yellow andbrown Labradors?

Detailed explanation: Part A: Explain the ResultThe breeder crossed a yellow Labrador male and a…

Answered: *29. A dog breeder liked yellow and…

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter8: Patterns Of Inheritance

Section: Chapter Questions

Problem 4RQ: Imagine that you are performing a cross involving seed color in garden pea plants. What traits would...

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In otters fur colour can be either yellow or brown, and is determined by two alleles of the C gene. A heterozygous otter is observed to present a fur pattern of yellow and bear patches. Explain why this can occur.
In labrador retrievers an allele B codes for black pigment and b codes for brown. A second gene E is responsible for deposition of pigment into the hair follicle. The e allele results in the blockage of pigment deposition. a. What fraction of yellow puppies would you predict to be born in a cross between a yellow labrador Bbee and a Black labrador BbEe? b. What color is a labrador with the genotype bbEe?
discussion of how coat color and pattern are determined in dogs. a. Why are Irish setters not black in color? b. Can a poodle crossed with any other breed produce spotted puppies? Why or why not? c. If a St. Bernard is crossed with a Doberman, what will be the coat color of the offspring: solid, yellow, saddle, or bicolor? d. If a Rottweiler is crossed with a Labrador retriever, what will be the coat color of the offspring: solid, yellow, saddle, or bicolor?
a) Both parents in generation I have orange-brown fur. However in generation II, only one cub has orange-brown fur and the other two have white fur. Explain why this is so. b) Describe the possible genotype of tiger B
In certain breeds of chicken, the appearance of the comb (a fleshy growth or crest on the top of the head of gallinaceous birds, such as turkeys, pheasants, and domestic chickens) is controlled by a single pair of genes. One type of comb, the pea comb, is dominant over a single comb. You own a rooster with a single comb. M a. What is the genotype of your rooster? b. Suppose you cross your rooster is crossed your neighbor's pea- combed hen. The brood of 13 eggs that is produced hatches to Single reveal 5 have single combs and 7 have pea combs. What was the genotype of your neighbor's hem? (Use a Punnett square to determine your results). Pea
Fruit flies are very useful model organisms that have been used to study genetics. One mutant recessive trait in fruit flies is called "eyeless" because it causes flies to have no eyes. Cross an eyeless fly with a homozygous normal fly. a. Draw the Punnett square. b. What is the genotyoe ratio of the offspring? c. What is the phenotype ratio of the offspring? d. What genetic problem is this? (monohybrid, dihybrid or multiple allele)
The process known as (FILL IN THE BLANK) of the (FILL IN THE BLANK) chromosome in some female cats results in a calico In Rare cases, males can express the calico fur pattern. what would the be genetic explanation for this?
a. What is the type of inheritance? b. What is known of the genotype of the male in the above cross? c. What is known of the genotype of the female in the above cross? d. Provide map distances if possible.
In cats, the gene for calico (multicolored) cats is both sex-linked and codominant. Due to a phenomenon known as dosage compensation, females that receive a B and an R gene have black and orange splotches on white Males can only be black or orange, but never calico. a. What would a calico cat’s genotype be? b. Show the cross of a female calico cat with a black male. What percentage of the kittens will be black and male? c. What percentage of the kittens will be calico and male? d. What percentage of the kittens will be calico and female? e. Show the cross of a female black cat with a male orange cat. f. What percentage of the kittens will be calico and female? What color will all the male cats be?
In certain species of flies, eye color is controlled by sim-·ple dominance by a single pair of alleles. A red-eyed fly was crossed with a white-eyed fly, both of whose parents had white eyes. All of their offspring (both female and male) had red eyes.a. Which is dominant, the allele for red eyesor the allele for white eyes?b. What is the genotype of the white-eyed parents?c. If the white-eyed parent was mated with one of the red-eyed offspring, what phenotypic ratio wouldyou expect regarding eye color?
Lincoln Red cattle are entirely red. Hereford cattle have a white face. The white face is due to a dominant allele for which the Hereford breed is homozygous. A farmer has a herd of Lincoln Red cows and Larry, a Lincoln Red bull. Larry was allowed to mate with the cows but died of exhaustion before he had fertilized the whole herd. The farmer borrowed a neighbor's Hereford bull called Herbert, to finish Larry's job. a.) When the calves were born, the farmer had found he could distinguish between Larry's and Herbert's offsprings. How? b.) He kept one of Herbert's male offspring to replace Larry. When this bull was mated to the Lincoln Red cows, what would be the phenotypes of the calves and in what proportions?
The B allele confers black coat color and the b allele brown coat color in Labrador dogs. When another gene, E, is inherited, the coat is golden no matter what the B phenotype is. A dog of genotype ee expresses the black phenotype. What unusual phenomenon is at work in this disorder?

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