Which of the following statement is TRUE?Recombinants cannot be formed without crossovers between two linked genes.O Recombinants cannot be formed without crossovers.O Recombinants can only be formed for alleles that follow independentassortment.Recombinants can only be formed for linked genesRecombinants of unlinked genes can only be formed by crossovers.

Two genes characterizing two different traits of an organism are located on two different…

Which of the following statement is TRUE? Recombinants cannot be formed without crossovers between two linked genes. Recombinants cannot be formed without crossovers. Recombinants can only be formed for alleles that follow independent assortment. Recombinants can only be formed for linked genes Recombinants of unlinked genes can only be formed by crossovers.

Which of the following statement is TRUE? Recombinants cannot be formed without crossovers between two linked genes. Recombinants cannot be formed without crossovers. Recombinants can only be formed for alleles that follow independent assortment. Recombinants can only be formed for linked genes Recombinants of unlinked genes can only be formed by crossovers.

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter13: Modern Understandings Of Inheritance

Section: Chapter Questions

Problem 2VCQ: Figure 13.4 Which of the following statements is true? Recombination of the body color and red/...

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Which of the following statements is TRUE? Positive interference occurs when a crossover in one region of a chromosome interferes with crossovers in nearby regions. The higher the coefficient of coincidence, the higher the degree of interference. Linked genes always exhibit recombination frequencies of greater than 50%. Two genes that are located far from each other on the same chromosome will show a lower frequency of recombination than two genes that are close together on the chromosome. Recombination mapping experiments become more accurate as the distance between genes increases.
Figure 13.4 Which of the following statements is true? Recombination of the body color and red/ cinnabar eye alleles will occur more frequently than recombination of the alleles for wing length and aristae length. Recombination of the body color and aristae length alleles will occur more frequently than recombination of red/brown eye alleles and the aristae length alleles. Recombination of the gray/black body color and long/short aristae alleles will not occur. Recombination of the red/brown eye and long/short aristae alleles will occur more frequently than recombination of the alleles for wing length and body color.
Which of the following statements about crossover is FALSE? Crossover between homologous chromosomes would lead to a reshuffling of alleles. Crossover between sister chromatids would lead to a reshuffling of alleles. O Crossover between non-sister chromatids would lead to a reshuffling of alleles. O Frequent crossover between linked genes that are far apart on the chromosome may lead to 50% recombinant frequency. O Crossover occurs at higher frequency between linked genes that are further apart than those that are close to each other.
Consider the genetic map below. (a) In a total of 1000 observed progeny, how many would be expected to be parental, non-recombinant? (b) If the total number of observed double-crossover recombinant progeny is 0, what is the interference? A-------20 cm-----B—5cm----C
Consider the genetic map below. (a) In a total of 1000 observed progeny, how many would be expected to be parental, non-recombinant? (b) If the total number of observed double-crossover recombinant progeny is 0, what is the interference? Show step by step work for full credit. A-------10cm-----B—2.5cm----C
Consider the genetic map below. (a) In a total of 1000 observed progeny, how many would be expected to be parental, non-recombinant? (b) If the total number of observed double-crossover recombinant progeny is 0, what is the interference? Show step by step A-------10cm-----B—2.5cm----C
Genes R, H and F are located on the same chromosome. On one chromosome R, h and f alleles are attached, while on the homologue contains r, H and F. Which of the following would be an example of a recombination event?
One yeast strain carries the alleles lys+ and arg+, whereas another strain has lys-3 and arg-2. The two strains were crossed toeach other, and an ascus obtained from this cross has four spores with the following genotypes: lys+ arg+, lys+ arg-2, lys-3arg+, and lys-3 arg 2. This ascus has a. a parental ditype.b. a tetratype.c. a nonparental ditype.d. either a tetratype or a nonparental ditype.
An individual is heterozygous for a reciprocal translocation, with the following chromosomes: A • B C D E F A • B C V W X R ST • U D E F R ST • U V W X Q. Draw the products of alternate, adjacent-1, and adjacent-2 segregations.
When true-breeding mice with brown fur and short tails (BBtt)were crossed to true-breeding mice with white fur and long tails(bbTT), all of the F1 offspring had brown fur and long tails. TheF1 offspring were crossed to mice with white fur and short tails.What are the possible phenotypes of the F2 offspring? Which F2offspring are recombinant, and which are nonrecombinant? Whatare the ratios of phenotypes of the F2 offspring if independentassortment is taking place? How are the ratios affected by linkage?
In your own words, explain why a testcross cannot produce more than 50% recombinant offspring. When a testcross does produce 50% recombinant offspring, what does this result mean?
Wild-type mice have brown fur and short tails. Loss of function of a particular gene produces white fur, while loss of function of another gene produces long tails, and loss of function at a third locus produces agitated behavior. Each of these loss of function alleles is recessive. If a wild-type mouse is crossed with a triple mutant, and their F1 progeny is test-crossed, the following recombination frequencies are observed among their progeny. Produce a genetic map for these loci. Brown, short tailed, normal: 955 White, short tailed, normal: 16 Brown, short tailed, agitated: 0 White, short tailed, agitated: 36 Brown, long tailed, normal: White, long tailed, normal: Brown, long tailed, agitated: 46 0 14 White, long tailed, agitated: 933