Q. No.All genes located on the same chromosome:
1.
Form different groups depending upon their relative distance
2.
Form one linkage group
3.
Will not from any linkage groups
4.
Form interactive groups that affect the phenotype
Conditions of a karyotype 2n +1, 2n –1 and 2n + 2, 2n – 2 are called:
| 1. | Aneuploidy | 2. | Polyploidy |
| 3. | Allopolyploidy | 4. | Monosomy |
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Distance between the genes and percentage of recombination shows:
| 1. | a direct relationship | 2. | an inverse relationship |
| 3. | a parallel relationship | 4. | no relationship |
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If a genetic disease is transferred from a phenotypically normal but carrier female to only some of the male progeny, the disease is:
| 1. | Autosomal dominant | 2. | Autosomal recessive |
| 3. | Sex-linked dominant | 4. | Sex-linked recessive |
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In sickle cell anaemia glutamic acid is replaced by valine. Which one of the following triplets codes for valine?
1. G GG
2. A A G
3. G A A
4. G U G
Person having genotype IA IB would show the blood group as AB. This is because of:
1. Pleiotropy
2. Co-dominance
3. Segregation
4. Incomplete dominance
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A cross between two tall plants resulted in offspring having few dwarf plants. What would be the genotypes of both the parents?
| 1. | TT and Tt | 2. | Tt and Tt |
| 3. | TT and TT | 4. | Tt and tt |
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In a dihybrid cross, if you get 9:3:3:1 ratio it denotes that:
1. The alleles of two genes are interacting with each other
2. It is a multigenic inheritance
3. It is a case of multiple allelism
4. The alleles of two genes are segregating independently
Which of the following will not result in variations among siblings?
1. Independent assortment of genes
2. Crossing over
3. Linkage
4. Mutation
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