Respuesta :
Margaret can have all her children with attached earlobes only if she marry a man with AA dominant genotype.
As given,
Margaret has detached earlobes (a) which is a recessive trait  If she wanted all of her children to have attached ears (A) if she have to marry a man with the dominant trait
Punnett' square:
                  A      A
            a    Aa     Aa Â
             a    Aa     Aa
[Aa] are the genotype with attached earlobes [dominant genotype]
Therefore, Margaret can have all her children with attached earlobes only if she marry a man with AA dominant genotype.
To know more about dominant and recessive trait.
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