Q. No.Match the terms in Column I with their description in Column II and choose the correct option.
Column I
Column II
A.
Dominance
1.
Many govern a single character
B.
Codominance
2.
In a heterozygous organism, only one allele expresses itself
C.
Pleiotropy
3.
In a heterozygous organism, both alleles express themselves fully
D.
Polygenic inheritance
4.
A single gene influences many characters
A
B
C
D
1.
2
3
4
1
2.
4
1
2
3
3.
4
3
1
2
4.
2
1
4
3
A cell at the telophase stage is observed by a student in a brought from the field. He tells his teacher that this cell is not like other cells at the telophase stage. There is no formation of a cell plate and thus the cell is containing more chromosomes as compared to other dividing cells. This would result in:
1. polyploidy
2. somaclonal variation
3. polyteny
4. aneuploidy
In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F1 generation, pink flowers were obtained. When pink flowers were selfed, the F2 generation showed white, red, and pink flowers. Choose the incorrect statement from the following:
| 1. | Law of Segregation does not apply in this experiment. |
| 2. | This experiment does not follow the Principle of Dominance. |
| 3. | The pink colour in F1 is due to incomplete dominance. |
| 4. | Ratio of F2 is 1/4(red):2/4(pink):1/4(white). |
Select the incorrect statement:
| 1. | Human males have one of their sex-chromosome much shorter than the other. |
| 2. | Male fruit fly is heterogametic. |
| 3. | In male grasshoppers, 50% of sperms have no sex chromosome. |
| 4. | In domesticated fowls, the sex of progeny depends on the type of sperm rather than the egg. |
The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by:
| 1. | Sutton Boveri | 2. | T.H. Morgan |
| 3. | Gregor J. Mendel | 4. | Alfred Sturtevant |
Which of the following characteristics represent the 'Inheritance of blood groups' in humans?
a. Dominance
b. Co-dominance
c. Multiple allelism
d. Incomplete dominance
e. Polygenic inheritance
| 1. | b, c, and e | 2. | a, b and c |
| 3. | b, d, and e | 4. | a, c, and e |
A genetic cross between homozygous individuals but with different alleles for a single gene of interest is called as:
1. A reciprocal cross
2. Monohybrid cross
3. Dihybrid cross
4. Test cross
Which of the following is not true for the Law of Dominance given by Mendel?
| 1. | Characters are controlled by discrete units called factors. |
| 2. | Factors occur in pairs. |
| 3. | In a dissimilar pair of factors one member of the pair dominates the other. |
| 4. | The alleles show blending at the time of fertilization |
A heterozygous plant produces:
1. Only one kind of gamete
2. Two kinds of gametes each having one allele with equal proportion.
3. Two kinds of gametes each having two alleles with equal proportion.
4. Two kinds of gametes each having one allele with one allele occurring in more gametes than the other.
What is the F2 phenotypic ratio in cases of incomplete dominance?
1. 1 : 1
2. 3 : 1
3. 1 : 2 : 1
4. 1 : 1
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