The sequence of which of the following is used to know the phylogeny?
1. | m-RNA | 2. | r-RNA |
3. | t-RNA | 4. | DNA |
In recent years, DNA sequences (nucleotide sequence) of mt-DNA and Y chromosomes were considered for the study of human evolution, because:
1. | They are small, and therefore, easy to study |
2. | They are uniparental in origin and do not take part in recombination |
3. | Their structure is known in greater detail |
4. | They can be studied from the samples of fossil remains |
There are two opposing views about the origin of modern man. According to one view, Homo erectus in Asia were the ancestors of modern man. A study of variation of DNA however suggested the African origin of modern man. What kind of observation of DNA variation could suggest this?
1. | Greater variation in Asia than in Africa |
2. | Similar variations in Africa and Asia |
3. | Variation only in Asia and no variation in Africa |
4. | Greater variation in Africa than in Asia |