Q361
Open questionGeologists standardly use which of the following to estimate the time of solidification of rock?
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Biology GK · all questionsGentics and Evoloution
Gentics and Evoloution
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Q362
Open questionAccording to Stebbins (1950), the isolation mechanisms that come under the category of internal barriers include
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Q363
Open questionFrameshift mutation arises due to
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Q364
Open questionIf the segment of a chromosome is repeated on a non-homologous chromosome, the duplication is said to be a
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Q365
Open questionWho coined the term 'gene'?
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Q366
Open questionThe substances used by the proliferating infecting Agrobacteria cells as sources of carbon and nitrogen are called
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Q367
Open questionConsider the following statements regarding translocation and choose the correct answer:
1. In translocation, a segment of a chromosome becomes attached to a non-homologous chromosome
2. In reciprocal translocations, two non-homologous chromosomes exchange segments
3.There is no addition or loss of genes during translocations, only a rearrangement
4. Translocations are due to irregularities during crossing over
1. In translocation, a segment of a chromosome becomes attached to a non-homologous chromosome
2. In reciprocal translocations, two non-homologous chromosomes exchange segments
3.There is no addition or loss of genes during translocations, only a rearrangement
4. Translocations are due to irregularities during crossing over
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Q368
Open questionAnthropoids were evolved into
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Q369
Open questionStrength of the linkage between the two genes is
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Q370
Open questionPresence of gill in the tadpole of frog indicates that
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Q371
Open questionConsider the following statements regarding the theory of linkage and choose the correct answer:
1. Genes are arranged in a linear fashion in the chromosomes
2. Genes that show linkage are situated in the chromosome
3. Linked genes remain in their original combination during the course of inheritance
4. The genes which are widely separated show strong linkage, while those closely located, have more chances to get separated by crossing over
1. Genes are arranged in a linear fashion in the chromosomes
2. Genes that show linkage are situated in the chromosome
3. Linked genes remain in their original combination during the course of inheritance
4. The genes which are widely separated show strong linkage, while those closely located, have more chances to get separated by crossing over
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Q372
Open questionWhich of the following is not a Mendelian disorder?
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Q373
Open questionFailure of segregation of chromatid during cell division cycle results in the gain or loss of chromosome which is called
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Q374
Open questionWho among the following showed that the animal and vegetable broths boiled for several hours and immediately sealed were never infested with microorganisms and disproved the spontaneous generation of microorganisms?
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Q375
Open questionAccording to which mode of replication, of the two double helices of DNA formed one would be entirely of old material and the other entirely of new material?
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Q376
Open questionConsider the following statements regarding chain elongation during DNA synthesis and choose the correct answer:
1. The separated strands are kept open by DNA binding proteins (DBPs)
2. A DNA chain is initiated on the 3'- OH end of the primer
3. Okazaki fragments are synthesized on one strand; there is continuous DNA synthesis in the other strand
4. Okazaki fragments are joined by endonuclease
1. The separated strands are kept open by DNA binding proteins (DBPs)
2. A DNA chain is initiated on the 3'- OH end of the primer
3. Okazaki fragments are synthesized on one strand; there is continuous DNA synthesis in the other strand
4. Okazaki fragments are joined by endonuclease
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Q377
Open questionCytological studies reveal that only those allelomorphs assort independently during meiosis which are located in
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Q378
Open questionThe addition or deletion of one or more bases in the coding region of a gene usually results in what are called as
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Q379
Open questionIn E. coli, the origin of DNA replication, Ori C occupies the place between the sites of genes
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Q380
Open questionThe percentage of total recombinants represents, in map units,
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