Genetics: Analysis and Principles
Genetics: Analysis and Principles
5th Edition
ISBN: 9780073525341
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Chapter 6.3, Problem 3COMQ
Summary Introduction

Introduction:

Gene is the segment of the DNA which transcribes in the functional product. The graphical representation of the DNA sequences or genes on the chromosome is known as genetic mapping.

The genetic mapping of chromosomes helps to determine the linear order and the distance between two genes that are linked to each other along the same chromosome. The percentage of the recombination is the basis for genetic mapping which helps to determine the physical distance between two genes because when two genes are very close to each other, there is less recombination percentage among them while when the genes are far apart from each other, it is most likely to have a recombination within them.

Therefore, the distance between two genes i.e. map distance is the number of recombinant offspring divided by the total number of offspring, multiplied by 100. The unit of distance between two genes is called a map unit (cM). One map unit is equal to 1% recombinant offspring in a test cross.

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Chapter 6 Solutions

Genetics: Analysis and Principles

Ch. 6.5 - 1. The process of mitotic recombination involves...Ch. 6 - 1. What is the difference in meaning between the...Ch. 6 - 2. When a chi square analysis is applied to solve...Ch. 6 - 3. What is mitotic recombination? A heterozygous...Ch. 6 - 4. Mitotic recombination can occasionally produce...Ch. 6 - 5. A crossover has occurred in the bivalent shown...Ch. 6 - A crossover has occurred in the bivalent shown...Ch. 6 - A diploid organism has a total of 14 chromosomes...Ch. 6 - If you try to throw a basketball into a basket,...Ch. 6 - 9. By conducting testcrosses, researchers have...Ch. 6 - In humans, a rare dominant disorder known as...Ch. 6 - 11. When true-breeding mice with brown fur and...Ch. 6 - Though we often think of genes in terms of the...Ch. 6 - 13. If the likelihood of a single crossover in a...Ch. 6 - 14. In most two-factor crosses involving linked...Ch. 6 - Researchers have discovered that some regions of...Ch. 6 - 16. Describe the unique features of ascomycetes...Ch. 6 - Prob. 17CONQCh. 6 - Explain the difference between an unordered versus...Ch. 6 - Figure 6.1 shows the first experimental results...Ch. 6 - Prob. 2EQCh. 6 - E3. The experiment of Figure 6.7 is not like a...Ch. 6 - Prob. 4EQCh. 6 - 3. Explain the rationale behind a testcross. Is it...Ch. 6 - 4. In your own words, explain why a testcross...Ch. 6 - Explain why the percentage of recombinant...Ch. 6 - 6. If two genes are more thanapart, how would you...Ch. 6 - 7. In Morgan’s three-factor crosses of Figure 6.3,...Ch. 6 - Two genes are located on the same chromosome and...Ch. 6 - 9. Two genes, designated A and B, are locatedfrom...Ch. 6 - 10. Two genes in tomatoes areapart; normal fruit...Ch. 6 - In the tomato, three genes are linked on the same...Ch. 6 - A trait in garden peas involves the curling of...Ch. 6 - Prob. 15EQCh. 6 - 14. In the garden pea, several different genes...Ch. 6 - A sex-influenced trait is dominant in males and...Ch. 6 - Three recessive traits in garden pea plants are as...Ch. 6 - In mice, a trait called snubnose is recessive to a...Ch. 6 - 18. In Drosophila, an allele causing vestigial...Ch. 6 - 19. Three autosomal genes are linked along the...Ch. 6 - 20. Let’s suppose that two different X-linked...Ch. 6 - Prob. 23EQCh. 6 - In mice, a dominant allele that causes a short...Ch. 6 - 2. In Chapter 3, we discussed the idea that the X...Ch. 6 - Mendel studied seven traits in pea plants, and the...
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