Consider the given two statements:
Assertion (A): The strength of linkage between two genes is directly proportional to the distance between them on the chromosome.
Reason (R):  Genes that are farther apart are less likely to be separated by recombination.
  
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. (A) is False, (R) is False.
Subtopic:  Linkage |
 61%
Level 2: 60%+
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Which of the following best explains a frequency of recombination of 50% in a dihybrid test cross?
1. The two genes are likely to be located on different chromosomes.
2. All of the offspring have combinations of traits that match one of the two parents.
3. The genes are located on sex chromosomes.
4. Abnormal meiosis has occurred.
Subtopic:  Linkage | Recombination Gene Mapping | Recombination & Gene Mapping |
 59%
Level 3: 35%-60%
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The unit for measurement of the distance between two linked genes on a chromosome is:
1. Centimorgans
2. Base pairs
3. Micrometers
4. Angstroms
Subtopic:  Chromosomal Basis of Inheritance: Further Considerations | Linkage |
 79%
Level 2: 60%+
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