61. Geologists standardly use which of the following to estimate the time of solidification of rock?
62. According to Stebbins (1950), the isolation mechanisms that come under the category of internal barriers include
63. Frameshift mutation arises due to
64. If the segment of a chromosome is repeated on a non-homologous chromosome, the duplication is said to be a
65. Who coined the term 'gene'?
66. The substances used by the proliferating infecting Agrobacteria cells as sources of carbon and nitrogen are called
67. Consider 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
68. Anthropoids were evolved into
69. Strength of the linkage between the two genes is
70. Presence of gill in the tadpole of frog indicates that
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