1. A population of lemmings includes two varieties with regards haircolour: those with green hair and those with red hair.A cross was made between a homozygous, green-haired lemming and ahomozygous, red-haired rodent. The resulting F₁ generation all had greenhair.a. Which colour allele is the dominant one? How doyou know?b. If a lemming from the F₁ generation was crossed with a red-hairedlemming, what would be the predicted outcome? Use a genetic crossdiagram or Punnet square to explain your answer.C. What ratio of offspring would you expect if lemmings fromthe F₁ generation were crossed with one another? Explain youranswer

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Description: 1. A population of lemmings includes two varieties with regards haircolour: those with green hair and those with red hair.A cross was made between a homozygous, green-haired lemming and ahomozygous, red-haired rodent. The resulting F₁ generation all

Gregor Mendel was an Austrian scientist, mathematician, and biologist who proposed laws of…

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Biology

1. A population of lemmings includes two varieties with regards hair colour: those with green hair and those with red hair. A cross was made between a homozygous, green-haired lemming and a homozygous, red-haired rodent. The resulting F₁ generation all had green hair. a. Which colour allele is the dominant one? How do you know?

1. A population of lemmings includes two varieties with regards hair colour: those with green hair and those with red hair. A cross was made between a homozygous, green-haired lemming and a homozygous, red-haired rodent. The resulting F₁ generation all had green hair. a. Which colour allele is the dominant one? How do you know?

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter12: Mendel, Genes, And Inheritance

Section: Chapter Questions

Problem 1TYK: The dominant C allele of a gene that controls color in corn produces kernels with color; plants...

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4.Two organisms, AABBCCDDEE and aabbccddee, are mated to produce an F1 that is self-fertilized. If the capital letters represent dominant, independently assorting alleles:(a) How many different genotypes will occur in the F2?(b) What proportion of the F2 genotypes will be recessive for all five loci?(c) Would you change your answers to (a) and/or (b) if the initial cross occurred between AAbbCCddee x aaBBccDDEE parents? (d) Would you change your answers to (a) and/or (b) if the initial cross occurred between AABBCCDDEE x aabbccddEE parents?
1. A gardener finds that some bean plants have pubescent leaves and others have glabrous leaves. a. Based on the results of the following crosses below, which trait is dominant, pubescent or glabrous? Which of the following crosses helped you determine the answer? b. Based on your answer in 1.a, determine the genotypes of the parents of each cross.
1. A woman who is heterozygous for the brown eye and blue eye alleles marries a man with blue eyes. What are the genotypes and phenotypes of the children? a) What is the genotypic ratio of the above cross (Write number next to genotype)? ___________________________________________________________________ b) What is the phenotypic ratio of the above cross? (Write number next to phenotype)? ___________________________________________________________________
1.) A farmer wants to breed a variety of taller corn. a) How can the farmer use variation in the height of the current corn plants to produce taller corn plants? b) Will the farmer’s work be most effective if height in corn plants is determined by polygenic inheritance, multiple alleles, or co-dominant alleles? Explain. c) The farmer finds that many of the tallest corn plants are also very susceptible to a particular disease. How could the farmer design an experiment to find out if the genes for height are linked to the genes for resistance to the disease?
2.In dogs, there is a hereditary deafness caused by a recessive allele, d. A kennel owner has a male dog that she wants to use for breeding purposes if possible. The dog can hear, but the owner is unsure of the genotype. She does a testcross (crosses it to a homozygous recessive dog), and two of the five offspring are deaf. This means that the male dog A.has the genotype DD B.has the genotype Dd C.is still of unknown genotype since there were offspring of both deaf and hearing phenotypes. D.has the genotype dd
2) Wolves sometimes have black coats with blue eyes. These two traits are controlled by genes on different chromosomes. Agouti coats are dominant (A) to black coats. Brown eyes are dominant (B) to blue eyes. a. A male blue eyed black coat male mates with a female heterozygous for both traits. How many possible different phenotypes can they produce? b. If they have 12 pups what is the expected numbers of each of the above phenotypes?
A true-breeding rabbit with agouti (mottled, grayish brown) fur crossed with a true-breeding rabbit with chinchilla (silver) fur produces all agouti offspring. A true-breeding chinchilla rabbit crossed with a true-breeding Himalayan rabbit (white fur with pigmented nose, ears, tail, and legs) produces all chinchilla offspring. A true-breeding Himalayan rabbit crossed with a true-breeding albino rabbit produces all Himalayan offspring. Explain the inheritance of the fur colors.
The dominant C allele of a gene that controls color in corn produces kernels with color; plants homozygous for a recessive c allele of this gene have colorless or white kernels. What kinds of gametes, and in what proportions, would be produced by the plants in the following crosses? What seed color, and in what proportions, would be expected in the offspring of the crosses? a. CCCc b. Cccc c. CcCc
In peas, the allele Le produces tall plants and the allele le produces dwarf plants. The Le allele is dominant to le. If a tall plant is crossed with a dwarf, the offspring are distributed about equally between tall and dwarf plants. What are the genotypes of the parents?
Two pairs of traits are segregating in a cross. Two parents produce 156 progeny that fall into 4 phenotypes. The numbers of offspring in the 4 phenotypes are 89, 31, 28, and 8. What are the genotypes of the two parents?
A farmer raises black and white chickens. To his surprise, when the first generation of eggs hatch all the chickens are black with white speckles throughout their feathers. What should the farmer expect when the eggs laid after interbreeding the speckled chickens hatch? All the offspring will be speckled 75% of the offspring will be speckled, and 25% will be black 50% of the offspring will be speckled, 25% will be black, and 25% will be white 50% of the offspring will be black and 50% of the offspring will be white.
Design an Experiment Imagine that you are a breeder of Labrador retriever dogs. Labs can be black, chocolate brown, or yellow. Suppose that a yellow Lab is donated to you and you need to know its genotype. You have a range of dogs with known genotypes. What cross would you make to determine the genotype of the donated dog? Explain how the resulting puppies show you the Labs genotype.