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Please can someone help me with my genetics homework?

GaryLeo
in Homework Help

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Hi,

I am having trouble understanding some things.

 

Firstly why is Piebald trait related to a gene on an autosome and not an X chromosome?

 

The mother is the carrier of the trait and the father is not, they have 4 children, 3 of them (2 sons and one daughter) are affected and 1 isn't (another daughter).

 

What would be the chance be of one of the affected sons passing the trait down to his children? I worked it out to be 1 in 4 chance but I am not so sure now.

 

Any help would be really appreciated.

Thanks.

:confused:

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