Genetic Analysis: An Integrated Approach (2nd Edition)
2nd Edition
ISBN: 9780321948908
Author: Mark F. Sanders, John L. Bowman
Publisher: PEARSON
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Chapter 4, Problem 12P
Using the information provided in Problems
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d.
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Assume the height in a particular plant is determined by two pairs of unlinked polygenes, each effective allele contributes 5cm to a base height of 10cm.a. What are the heights of each parent?b. What height is to be expected in the F1 if there are no environmental effects?c. What is the expected phenotypic ratio in the F2
In one of Mendel’s dihybrid crosses, he observed315 round, yellow; 108 round, green; 101 wrinkled,yellow; and 32 wrinkled, green F2 plants. Analyze thesedata using the x2 test to see if(a) they fit a 9:3:3:1 ratio.(b) the round:wrinkled data fit a 3:1 ratio.(c) the yellow:green data fit a 3:1 ratio.
Hibiscus plants have different varieties of flowers. In an instance, both the red and white flowers showed that they are incompletely dominant with each other. If the flowers that were produced in the Hibiscus experiment was cross bred with each other, what is the ratio of their genotype? Explain.
A) 1:3
B) 1:1:1:1
C) 1:2:1
D) 2:2
Chapter 4 Solutions
Genetic Analysis: An Integrated Approach (2nd Edition)
Ch. 4 - 1. Define and distinguish incomplete penetrance...Ch. 4 -
2. Define and distinguish epistasis and...Ch. 4 - When working on barley plants, two researchers...Ch. 4 - Fifteen bacterial colonies growing on a complete...Ch. 4 - 5. In a type of parakeet known as a “budgie,”...Ch. 4 - 6. The and blood groups are given below for four...Ch. 4 - The wild-type color of horned beetles is black,...Ch. 4 - 8. Two genes interact to produce various...Ch. 4 - Prob. 9PCh. 4 - 10. In rats, gene produces black coat color if the...
Ch. 4 - 11. In the rats identified in Problem, a third...Ch. 4 - Using the information provided in Problems 10 and...Ch. 4 - 13. Total cholesterol in blood is reported as the...Ch. 4 - 14. Flower color in snapdragons results from the...Ch. 4 - 5. A plant line with reduced fertility comes to...Ch. 4 - Prob. 16PCh. 4 - The coat color in mink is controlled by two...Ch. 4 - Prob. 18PCh. 4 - 19. Feather color in parakeets is produced by the...Ch. 4 - Brachydactyly type D is a human autosomal dominant...Ch. 4 - 21. A male and a female mouse are each from...Ch. 4 - Xerodermapigmentosum (XP) is an autosomal...Ch. 4 - 23. Three strains of green-seeded lentil plants...Ch. 4 - Blue flower color is produced in a species of...Ch. 4 - 25. The following crosses are performed between...Ch. 4 - Two pure-breeding strains of summer squash...Ch. 4 - Marfan syndrome is an autosomal dominant disorder...Ch. 4 - 28. Yeast are single-celled eukaryotic organisms...Ch. 4 - Prob. 29PCh. 4 - Dr. Ara B. Dopsis and Dr. C. Ellie Gans are...Ch. 4 - Human ABO blood type is determined by three...Ch. 4 - In rabbits, albinism is an autosomal recessive...Ch. 4 - Dr. O. Sophila, a close friend of Dr. Ara B....Ch. 4 - In a breed of domestic cattle, horns can appear on...
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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
- Imagine that you are performing a cross involving seed color in garden pea plants. What traits would you expect to observe in the F1 offspring if you cross true-breeding parents with green seeds and yellow seeds? Yellow seed color is dominant over green. a. only yellow-green seeds b. only yellow seeds c. 1:1 yellow seeds:green seeds d. 1:3 green seeds:yellow seedsarrow_forwardImagine that you are performing a cross involving seed texture in garden pea plants. You cross true-breeding round and wrinkled parents to obtain F1 offspring. Which of the following experimental results in terms of numbers of plants are closest to what you expect in the F2 progeny? a. 8lOroundseeds b. 8lOwrinkledseeds c. 405:395 round seeds:wrinkled seeds d. 610:190 round seeds:wrinkled seedsarrow_forwardSuppose that in barley plants, the allele for tall stalks is dominant over short stalks and the allele for wide leaves is dominant over thin leaves. What would be the best way to determine the genotype of a barley plant with a tall stalk and wide leaves? Choose 1 answer: A.Perform a testcross with a barley plant that has a tall stalk and thin leaves. B.Perform a testcross with a known heterozygous barley plant . C. Perform a testcross with a barley plant that has a short stalk and thin leaves. D. Perform a testcross with a barley plant that has a tall stalk and wide leaves.arrow_forward
- Assume that a cross is made between a heterozygous tall pea plant and a homozygous short pea plant. Fifty offspring are produced in the following frequency: 32 = tall; 18 = short (a) What frequency of tall and short plants is expected? (b) Compute a Chi-square value associated with the appropriate test of significance. (c) How should this result be interpreted regarding the null hypothesis?arrow_forwardA cross between individuals with the genotypes AaBb and aabb produces 1000 offspring. The aabb class contains 380 individuals. a. Are genes a and b linked? Explain your answer. b. What is the linkage configuration in the heterozygote parent. c. What types of gametes will be formed by the heterozygote parent and in what proportions? Give only the allele compositions of the gametes in brackets and their relative proportions.arrow_forwardLet us suppose that two long-winged flies were crossed and that 77 long-winged and 24 short-winged specimens were counted in the offspring. a. Will the short-winged character be dominant or recessive?B. What will the genotypes of the parents be?C. What is the observed genotype ratio?arrow_forward
- shows the results of a cross between a tall pea plant and a short pea plant. a. What phenotypes and proportions will be produced if a tall F1 plant is backcrossed to the short parent? b. What phenotypes and proportions will be produced if a tall F1 plant is backcrossed to the tall parent?arrow_forwardGregor Mendel proposed the law of independent assortment based on the observation that dihybrid crosses of heterozygous individuals produced progeny in a 9:3:3:1 ratio. For this observation to hold, which assumption must be true? A. The traits are governed by genes on different chromosomes. B. The traits are governed by genes on the same chromosome. C. The traits are governed by genes with only two alleles. D. The traits are governed by genes with only three alleles.arrow_forwardshows the results of a dihybrid cross involving seed shape and seed color. a. What proportion of the round and yellow F2 progeny from this cross is homozygous at both loci? b. What proportion of the round and yellow F2 progeny from this cross is homozygous at least at one locus?arrow_forward
- The allele for red feather color in pigeons (B), is dominant to the allele for brown feathers (b.) A red pigeon that has a red parent and a brown parent is mated with a brown pigeon. a.) Give the genotypes of the two pigeons being mated. b.) what proportion of the F1 progeny would be expected to have brown feathers? Assume that these pigeons produce five young pigeons. c.) what is the probability that all five will be red? d.) What is the probability that 3 will be red and 2 will be brown?arrow_forwardA) what are the genotypes for EB27 and EB67? B) what is the relationship between the three alleles (B,br, y)? Show evidence using the pedigreearrow_forwardA researcher crosses mice with apricot eyes and long tails, and the F1 progeny were recovered in the following numbers and phenotypic classes:F1: 21 apricot, short : 30 brown, long : 19 brown, short : 110 apricot, longYou know the genes encoding these traits are autosomal, completely dominant and assort independently. You want to use a chi-square test to analyse these results.a) What is your null hypothesis for the chi-square test? b) You obtain a value of 11.33 for the chi-square test. What conclusion can you make from the results of the chi-square test? c) Give the expected number of individuals in the “apricot, long” class. d) Making use of the appropriate genetic convention for naming alleles, give the genotype of any of the progeny in the “apricot, long” class.arrow_forward
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