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Chapter 13: Q. 7 (page 343)

Which recombination frequency corresponds to perfect linkage and violates the law of independent assortment?

a. 0

b. 0.25

c. 0.50

d. 0.75

Short Answer

Expert verified

The Correct answer is A.

Step by step solution

01

Step. 1 Introduction

Independent Assortment illustrates how various genes individually segregate of each other throughout the development of genetic material.

The strong relationship between alleles or any other Nucleotide sequences on the very same chromosomes is referred to as linkage.

02

Step. 2 Explanation for correct answer.

A complete linkage is a state in which the alleles are relatively near to one other, resulting in perfect allele recombination.

03

Step. 3 Explanation for incorrect answer.

Option b. A recombination frequency of 0.25 means that 25% of the offspring are recombinants, with the remaining 75% being parental types.

Option c. The 0.50 percentage recombination frequency indicates that 50% are recombinant and 50% are parental.

Option d. A 0.75 frequency is not feasible since each parent contributes 50% of their genes. In every situation, the progeny will have 50 percent or more paternal type.

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Most popular questions from this chapter

Assume a pericentric inversion occurred in one of two homologs prior to meiosis. The other homolog remains normal. During meiosis, what structure鈥攊f any鈥攚ould these homologs assume in order to pair accurately along their lengths?

a. V formation

b. cruciform

c. loop

d. pairing would not be possible

Abnormalities in the number of X chromosomes tends to have milder phenotypic effects than the same abnormalities in autosomes because of _______

a. deletions

b. nonhomologous recombination

c. synapsis

d. X inactivation

Which of the following statements is true? a. 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. b. 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. c. Recombination of the gray/black body color and long/short aristae alleles will not occur. d. 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.

Figure 13.3 In a test cross for two characteristics such as the one shown here, can the predicted frequency of recombinant offspring be 60 percent? Why or why not?

X-linked recessive traits in humans (or in Drosophila) are observed ________.

a. in more males than females

b. in more females than males

c. in males and females equally

d. in different distributions depending on the trait
See all solutions

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