n guinea pigs, rough coat dominant (r) to smooth coat (r) and black coat (b) is dominant to white caot (b). a rough black guinea pig bred with a rough white one produces 29 rough black offspring, 31 rough white offspring, 11 smooth black and 9 smooth white. giv

n guinea pigs, rough coat dominant (r) to smooth coat (r) and black coat (b) is dominant to white caot (b). a rough black guinea pig bred with a rough white one produces 29 rough black offspring, 31 rough white offspring, 11 smooth black and 9 smooth white. giv

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Description: in guinea pigs, rough coat dominant (r) to smooth coat (r) and black coat (b) is dominant to white caot (b). a rough black guinea pig bred with a rough white one produces 29 rough black offspring, 31 rough white offspring, 11 smooth black and 9 smoot

Science Of Agriculture Biological Approach

5th Edition

ISBN:9780357229323

Author:Herren

Publisher:Herren

Chapter4: The Science Of Genetics

Section: Chapter Questions

Problem 1SLA

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In guinea pigs, rough coat is dominant (R) to smooth coat (r), and black coat (B) is dominant to white coat 9. (b). A rough black guinea pig bred with a rough white one produces 29 rough black offspring, 31 rough white offspring, 11 smooth black offspring, and 9 smooth white offspring. Give the genotypes of the parents, the probability for the offspring, and the actual number of each kind of offspring you would expect. Genotype of the rough, black parent? Genotype of the rough, white parent? Genotypes Phenotypes What is the probability of getting rough, black offspring? What is the probability of getting rough, white offspring? What is the probability of getting smooth, black offspring? What is the probability of getting smooth, white offspring? Of the 80 offspring that were produced, we might have expected how many of them to be rough and black? Of the 80 offspring that were produced, we might have expected how many of them to be rough and white? Of the 80 offspring that were…
n the Asiatic Black Bear (a normal XX:XY mammal XX: species) there are two traits under investigation. One trait is a white chest spot which can be either circular (+) or oval (ov). The second trait relates to the fur color with two phenotypes: black (+) and a reddish brown (b). A reddish brown female with a circular chest spot was crossed to a black male also with a circular chest spot. Use this information and the data below on their offspring to answer the following questions: Males: All reddish brown colored with 75% circular spot and 25% oval spot. Females: All black colored with 75% circular spot and 25% oval spot a) Which general type of chromosome does each trait reside on? Fur color gene ________________ Chest spot gene _________________ b) What are the genotypes of the two individuals that were crossed? c) What would the phenotypes and phenotypic ratio be if the original female was crossed with a reddish brown male with an…
Black coat colour in cocker Spaniels is governed by a dominant allele B and red coat colour by its recessive allele b; solid pattern is governed by the dominant allele of an independently assorting locus S, and sported pattern by its recessive allele s. A solid black male is mated to a solid red female and produces a litter of six pups: two solid black, two solid red, one black and white, and one red and white. (a) What are the possible genotypes of all the phenotypes obtainable? (b) Determine genotype of the parents. Hint- an unknown portion of a genotype may be indicated by a dash (-).
In cats, the locus for orange coat color is sex linked. Male cats that are black have the o+ allele, whereas those that are orange have the o allele. Females can be homozygous for the orange allele or homozygous for the black allele and will express each color, respectively. Heterozygous females are tortoise-shelled or calico, having orange and black patches. A calico cat, in addition to being heterozygous at the orange locus, also is either heterozygous or homozygous for the incompletely dominant, autosomal spotting allele (SS = large spots, Ss = small spots, ss = no spots). Manx tails are caused by a dominant trait that is lethal when homozygous. Long tails are the result of a homozygous recessive genotype. An orange male with small white spots and a manx tail is crossed to a calico female with small white spots and a manx tail. What is the probability of observing a solid black female with no spots and long tail? (Hint: All calico cats are female!)
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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?
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