Why Do Offspring Inherit A,a or a Instead of A,a and a,a in Genetic Crosses?

[Medicol]

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 ?

Homework Equations

Nothing related.

The Attempt at a Solution

I don't know

 

[epenguin]

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 ?

Homework Equations

Nothing related.

The Attempt at a Solution

I don't know

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?

 

[Medicol]

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.

 

[epenguin]

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.