Why do so many geneticists focus on studying yeast, fruit flies, nematodes, mice or the small plant Arabidopsis?

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Question:

Why do so many geneticists focus on studying yeast, fruit flies, nematodes, mice or the small plant Arabidopsis?

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Answer: They are all genetically tractableExplanation:Yeast, fruit flies, nematodes, mice or the small plant Arabidopsis have known genome i.e their entire genetic information is known to the scientific community, thus they are EASILY MODIFIED in genetic research. Also, they are simple eukaryotes (having cells with defined nucleus) so they can explain the processes in the human eukaryotic cell during genetic research Both reasons make them genetically tractable

Answer:They have multiple features that allow for cheap, fast and efficient manipulation of genes and chromosomes.  Explanation:

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