Ans.
Gene are considered as fundamental units of DNA. The similarity in DNA sequences of different organisms reflect a common ancestry, which appears to be shared by all organisms present on earth.
Human DNA shows very less similarity with weeds' (plants) DNA, which is around 18%. Thus, plants show different metabolic functions from humans, such as photosynthesis.
Human DNA shows around 26% similarity with yeast (fungus) DNA, as yeasts have some housekeeping genes, same as genes present in humans. For example, genes to uptake energy from sugar breakdown.
Human DNA shows 44 % similarity with fruit fly (insect) DNA. Mammals, such as humans and insects share genes, which are responsible for their growth and structures.
Human DNA shows 92 % similarity with DNA of mouse as they both are mammals and share many common genes.
Human DNA shows 98 % similarity with DNA of chimpanzee. That is why, chimpanzees are considered as closest relative of humans.
1. Human DNA shows very less similarity with weeds' (plants) DNA, which is around 18%. Thus, plants show different metabolic functions from humans, such as photosynthesis.
2. Human DNA shows 44 % similarity with fruit fly (insect) DNA. Mammals, such as humans and insects share genes, which are responsible for their growth and structures.
3. Human DNA shows 92 % similarity with DNA of mouse as they both are mammals and share many common genes.
4. Human DNA shows 98 % similarity with DNA of chimpanzee. That is why, chimpanzees are considered as closest relative of humans.
Gene are considered as fundamental units of DNA. The similarity in DNA sequences of different organisms reflects a common ancestry, which appears to be shared by all organisms present on earth.
Thus, these are the answers.
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