Galactosemia is an autosomal recessive disorder caused b...

Question

Galactosemia is an autosomal recessive disorder caused by the inability to metabolize galactose, a component of the lactose found in mammalian milk. Galactosemia can be partially managed by eliminating dietary intake of lactose and galactose. Amanda is healthy, as are her parents, but her brother Alonzo has galactosemia. Brice has a similar family history. He and his parents are healthy, but his sister Brianna has galactosemia. Amanda and Brice are planning a family and seek genetic counseling. Based on the information provided, complete the following activities and answer the questions.

What is the probability that the first child of Amanda and Brice will have galactosemia? Show your work.

Accepted Answer

Hello, everyone. Here. We have a question that says galactic senior happens when there's a change mutation and the genes that make an enzyme that breaks down galactose to have galactus E mia, a child must inherit two galactic senior genes, one from each parent. If both parents who are found to be galactic, senior characters are planning for a child. What will be the probability that the child will be a carrier affected or healthy respectively? So let's draw opponents square. Now each parent is going to be hetero ziggy's dominant. So that will be a capital G, lower case G, capital G lowercase G. So our first offspring is going to be capital G, capital G R. Second offspring will be capital G, lower case G. Our third offspring will be capital G, lowercase G and our fourth offspring will be lower case G, lower case G. So first, we want to find the probability that the child will be a carrier And that is capital G lower case G. So there is a 50% chance that the child will be a carrier And affected would be lower case G, lower case G. So that is a 25% chance And healthy will be capital G, capital G which is also a 25% chance. So our answer here is a 50%, 25%. Thank you for watching. Bye.

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