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Homework Help: Allele at Genetic locus

  1. Aug 12, 2014 #1
    1. If parents contain Aa and aa for example, then why their division doesn't result in
    A,a and a,a but only A,a and a ?

    2. Relevant equations
    Nothing related.

    3. The attempt at a solution
    I don't know
  2. jcsd
  3. Aug 12, 2014 #2


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    Homework Helper
    Gold Member

    No context here to associate a meaning to the question.

    At the very least quote the exact question.

    Don't know what 'division' means here and anything saying
    "doesn't result in A,a... but only A,a and...." sounds like having been garbled.

    Sounds like diploid genotypes so what is a?
  4. Aug 12, 2014 #3
    Thank you, I am asked what genotypes the children may have from such 2 parents. And I wonder why the haploid gamete genotype of the mother (aa) is only a but not a,a.
    A, a are dominant and regressive genes.
  5. Aug 13, 2014 #4


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    Homework Helper
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    You may need to read back particularly definitions of the terms. Or http://www.ksu.edu/biology/pob/genetics/defin.htm

    This seems now to be about 'haploid genotype'. If the mother (or father) is of is of genotype aa she (or he) can produce only a gametes seems to be all they are saying.
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