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That the pairing and separation of a pair of chromosomes would lead to the segregation of a pair of factors they carried is the argument that formed the basis for:
1. the Law of Independent Assortment.
2. the concept of Linkage
3. the chromosomal theory of inheritance.
4. the One Gene One Enzyme hypothesis.
Subtopic:  Chromosomal Basis of Inheritance: Introduction |
 52%
Level 3: 35%-60%
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The chromosomal theory of inheritance:
I: identifies chromosomes as the carriers of genetic material.
II: was given by Sutton and Boveri.
 
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic:  Chromosomal Basis of Inheritance: Introduction | Chromosomal Basis of Inheritance: Further Considerations |
 84%
Level 1: 80%+
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In 1900, Mendel’s work was rediscovered by:

1. Khorana, Nirenberg and Mathei
2. de Vries, Correns and von Tschermak
3. Avery, McCleod and McCarty
4. Watson, Crick and Wilkins
Subtopic:  Chromosomal Basis of Inheritance: Introduction |
 93%
Level 1: 80%+
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The two alleles of a gene pair are located on:

1. The same chromosome.
2. Different chromosomes.
3. Homologous sites on homologous chromosomes.
4. Homologous sites on heterologous chromosomes.
Subtopic:  Chromosomal Basis of Inheritance: Introduction |
 79%
Level 2: 60%+
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“Chromosomes, which are seen in all dividing cells and pass from one generation to the next, are the basis for all genetic inheritance”.
This statement is credited to:

 
1. Watson and Crick 2. Hershey and Chase
3. Sutton and Boveri 4. Meselson and Stahl

Subtopic:  Chromosomal Basis of Inheritance: Introduction |
 81%
Level 1: 80%+
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T. H. Morgan worked on the fruit fly, Drosophila melanogaster. Which of the following is not an advantage of this fly?

1. They could be grown on a simple synthetic medium in the laboratory.
2. They complete their life cycle in about two years, and a single mating could produce a large number of progeny flies.
3. There was a clear differentiation of the sexes – the male and female flies are easily distinguishable.
4. It has many types of hereditary variations that can be seen with low-power microscopes.
Subtopic:  Chromosomal Basis of Inheritance: Introduction |
 88%
Level 1: 80%+
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When Morgan hybridised yellow-bodied, white-eyed females to brown-bodied, red-eyed males and intercrossed their F1 progeny, the F2 ratio deviated very significantly from the 9:3:3:1 ratio. This can be attributed to the fact that:

1. The genes are located on the X and Y chromosomes.
2. Fruit fly has abnormal chromosomes.
3. The genes are located on the X chromosome.
4. The genes exhibit incomplete dominance.
Subtopic:  Chromosomal Basis of Inheritance: Introduction | Chromosomal Basis of Inheritance: Further Considerations | Understanding Linkage |
 68%
Level 2: 60%+
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Consider the given two statements:
Assertion(A): Behaviour of chromosomes at the time of cell division decides the behaviour of genes.
Reason(R): Chromosomes are the vehicles of the genes.
 
1. (A) is False but (R) is True.
2. Both (A) and (R) are True and (R) is the correct explanation of (A).
3. Both (A) and (R) are True but (R) is not the correct explanation of (A).
4. (A) is True but (R) is False.
Subtopic:  Chromosomal Basis of Inheritance: Introduction |
 76%
Level 2: 60%+
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