Genes a and b are 20 cM apart. An a+ b+/a b individual was mated with an a b/a b individual. Which of the following is a progeny class and proportion you would expect to see in the next generation? Group of answer choices 20% a+ b/ a b 10% a b/ a b 10% a+ b+/ a b 40% a b/ a b

Genes a and b are 20 cM apart. An a+ b+/a b individual was mated with an a b/a b individual. Which of the following is a progeny class and proportion you would expect to see in the next generation? Group of answer choices 20% a+ b/ a b 10% a b/ a b 10% a+ b+/ a b 40% a b/ a b

Name: Genes a and b are 20 cM apart. An a+ b+/a b individual was mated with
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Description: Genes a and b are 20 cM apart. An a+ b+/a b individual was mated with an a b/a b individual. Which of the following is a progeny class and proportion you would expect to see in the next generation?Group of answer choices20% a+ b/ a b10% a b/ a b10% a

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter15: Genomes And Genomics

Section: Chapter Questions

Problem 2QP: Hemophilia and color blindness are both recessive conditions caused by genes on the X chromosome. To...

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Genes a and b are 20 cM apart. An a+ b+/a b individual was mated with an a b/a b individual. which of the following is a recombinant progeny class you might observe in the next generation? Group of answer choices a+ b/a+ b+ a+ b+/a b a b+/ a b a b/a b
An organism of the genotype AaBbCc was testcrossed to a triply recessive organism (aabbcc). The genotypes of the progeny are presented in the following table. 20 AaBbCc 20 AaBbcc 20 aabbCc 20 aabbcc 5 AabbCc 5 Aabbcc 5 aaBbCc 5 aaBbcc (a) If these three genes were all assorting independently, how many genotypic and phenotypic classes would result in the offspring, and in what proportion, assuming simple dominance and recessiveness in each gene pair? (b) Answer part (a) again, assuming the three genes are so tightly linked on a single chromosome that no crossover gametes were recovered in the sample of offspring. (c) What can you conclude from the actual data about the location of the three genes in relation to one another?
. A corn geneticist has three pure lines of genotypes a/a ; B/B ; C/C, A/A ; b/b ; C/C, and A/A ; B/B ; c/c. All the phenotypes determined by a, b, and c will increase the market value of the corn; so, naturally, he wants to combine them all in one pure line of genotype a/a ; b/b ; c/c. a. Outline an effective crossing program that can be used to obtain the a/a ; b/b ; c/c pure line. b. At each stage, state exactly which phenotypes will be selected and give their expected frequencies. c. Is there more than one way to obtain the desired genotype? Which is the best way?Assume independent assortment of the three gene pairs. (Note: Corn will self or cross-pollinate easily.
Assume that you have a garden and some pea plants have solid leaves and others have striped leaves. You conduct a series of crosses (a through e) and obtain the results given in the table. Progeny Cross Solid Striped (a) solid X striped 55 60 (b) solid X solid 36 0 (c) striped X striped 0 65 (d) solid X solid 92 30 (e) solid X striped 44 0 Define gene symbols and give the possible genotypes of the parents of each cross.
An individual heterozygous for four genes, A/a • B/b •C/c • D/d, is testcrossed with a/a • b/b • c/c • d/d, and 1000progeny are classified by the gametic contribution ofthe heterozygous parent as follows:a • B • C • D 42A • b • c • d 43A • B • C • d 140a • b • c • D 145a • B • c • D 6A • b • C • d 9A • B • c • d 305a • b • C • D 310a. Which genes are linked?b. If two pure-breeding lines had been crossed toproduce the heterozygous individual, what would theirgenotypes have been?c. Draw a linkage map of the linked genes, showing theorder and the distances in map units.d. Calculate an interference value, if appropriate
You self-fertilize an F1 plant to produce the F2 generation. Based on Mendelian principles of inheritance, what fraction of the F2 generation do you expect to be short with round, green seeds? HINT: Solving this problem will require a very large Punnett square (8 x 8), but you can easily solve it using the Multiplication Rule
An organism of the genotype AaBbCc was testcrossed to a triplyrecessive organism (aabbcc). The genotypes of the progeny are inthe following table.AaBbCc 20 AaBbcc 20aabbCc 20 aabbcc 20AabbCc 5 Aabbcc 5aaBbCc 5 aaBbcc 5 a.) Assuming simple dominance and recessiveness in each genepair, if these three genes were all assorting independently,how many genotypic and phenotypic classes would result inthe offspring, and in what proportion? b.) Answer part (a) again, assuming the three genes are sotightly linked on a single chromosome that no crossovergametes were recovered in the sample of offspring. c.) What can you conclude from the actual data about thelocation of the three genes in relation to one another?
Genes A and B are on two different chromosomes. You construct a Punnett Square to to show the expected genotypes in the offspring of a cross between these two genotypes: AaBB x AaBb. What are the dimensions of the smallest Punnett square you can make to show the expected results? (e.g., 2x2, 4x1. Don’t worry about the order of the two numbers if they differ. That is, 4x8 is the same as 8x4)
. Which part of the pedigree in Figure 2-23 in your opinion best demonstrates Mendel’s first law?
In corn, we cross the pure line s t to the pure line u. It is known that the genes are linked in the order t s u. If the F1 is testcrossed, of the options given, which phenotypic class will have the lowest percentage? A.s u B.s C.tu D.s u t E. WT
A recessive maternal effect mutant in zebrafish, called ichabod, results in embryos lacking heads that are non-viable. You have been instructed to identify females that are homozygous for the ichabod mutant allele. At your disposal are a tank of wild-type fish (males and females), a tank of male and female parental fish that are all heterozygous for the ichabod mutant allele (ichabod/+), and a tank of F1 fish derived from a cross between a heterozygous male and heterozygous female (ichabod/+). Which of the following would be a way to identify females that are homozygous mutant, i.e. ichabod/ichabod? Select all answers that would work.
The pedigree shown below illustrates the inheritance pattern for a trait controlled by a single fully penetrant gene with complete dominance. Based on the pedigree do the following: a - List one mode of inheritance consistent with the pedigree . b. using the mode listed (a) the genotypes of individuals I.2, II.5, and III.3. (if two genotypes are possible for any of these individuals, list both). asap please.