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    I'm confused with some stuff which I'm working on:

    - "Suggest one source of DNA obtained from otters" (I put down blood but I'm not sure if this is relating to DNA sequencing etc?)

    - Does a higher allele frequency mean a greater genetic diversity? I said yes but my notes say no and I'm confused.

    - How can somebody obtain data to give a more precise biodiversity index for a habitat with plants? Would examining the proportion and number of different alleles in the gene pool be viable?

    Any help would be much appreciated
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    (Original post by dayumz)
    I'm confused with some stuff which I'm working on:

    - "Suggest one source of DNA obtained from otters" (I put down blood but I'm not sure if this is relating to DNA sequencing etc?)

    - Does a higher allele frequency mean a greater genetic diversity? I said yes but my notes say no and I'm confused.

    - How can somebody obtain data to give a more precise biodiversity index for a habitat with plants? Would examining the proportion and number of different alleles in the gene pool be viable?

    Any help would be much appreciated
    The first one would be correct, but obtaining blood is quite an invasive procedure. You can simply obtain an otter's DNA by taking a bit of hair/fur.

    Secondly, allele frequency is the relative frequency of an allele (variant of a gene) at a particular locus in a population. So if there is a high allele frequency in a population it means there's a lower genetic diversity.

    Lastly, there are different methods of obtaining a biodiversity index within a habitat. I'm not sure what you mean by "examining the proportion and number of different alleles in the gene pool be viable?". How would you go about this? By the sounds of it, that would require extracting samples, processing and sequencing DNA and then compiling the results at the end. This would be a very lengthy process and I don't think the exam board would expect this to be an answer.

    You should be able to check your text book for a reliable method of sampling plants. There was one I done during my A-levels using quadrants and sampling one area, then extrapolating to the whole field.
 
 
 
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