Q. No.
The law of Segregation is based on the fact that
| 1. | The alleles do not show any blending |
| 2. | There is random fertilization |
| 3. | Gametes are pure for the trait |
| 4. | The zygotes are diploid |
The inheritance of flower colour in dog flower and 4’O clock plant exhibits:
1. Complete dominance
2. Incomplete dominance
3. Co-dominance
4. Lethality
In complete dominance, the recessive allele with respect to the dominant allele:
1. Produces no product
2. Produces a different product
3. Produces half the product
4. Produces no product or a non-functional product
The number of alleles, the genotypic combinations and phenotypes in ABO system is respectively:
(1) 3, 6 and 4
(2) 3, 4 and 6
(3) 2, 3 and 4
(4) 2, 3, and 6
Suppose a gene has seven alleles. What would be the number of alleles in an individual at any instant?
(1) 1
(2) 7
(3) 2
(4) 3
In case of starch synthesis in pea seeds [controlled by B gene], BB homozygotes produce large and round starch grains; bb homozygotes produce smaller and wrinkled starch grains and Heterozygotes produce round seeds of intermediate size. What can be inferred from this observation?
| 1. | The gene B mutates at a faster rate. |
| 2. | The gene B is easily influenced by the environment |
| 3. | Dominance is not an autonomous feature of a gene or the product that it has information for |
| 4. | Some genes do not follow the law of segregation |
When Mendel self hybridized F1 progeny of a dihybrid cross between pure Yellow Round seeded plants and Green Wrinkled plants, he observed that yellow and green colour segregated in a ratio of:
1. 1 : 1
2. 3 : 1
3. 9 : 3 : 3 : 1
4. 1 : 2 : 1
In 1900 Mendel’s work was rediscovered by:
1. Korana, Nirenberg and Mathei
2. De Vries, Correns and von Tschermak
3. Avery, McCleod and McCarty
4. Watson, Crick and Wilkins
Genes tightly linked on the same chromosome show:
(1) Very high recombination
(2) Independent assortment
(3) Very low recombination
(4) 50 % recombination
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