John had unattached earlobes like his father, but his mother has attached earlobes. What is johns genotype with unattached being dominant

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08-12-2021
Biology

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John had unattached earlobes like his father, but his mother has attached earlobes. What is johns genotype with unattached being dominant

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mboluwape mboluwape · Answer 1 · 2021-12-14T11:46:42+01:00

Genotype refers to the complete genetic make-up and can also be referred to as the alleles an organism carries on a particular gene.

John's genotype with unattached being dominant is Aa.

Using A to represent the alleles

Since his mother has attached earlobes, her condition can only be inherited in the recessive condition (aa).
So for John to have an unattached earlobe, his father has to be either AA or Aa.
Therefore John's genotype would be Aa

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