Genetic Counseling Video Lessons

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Problem: Look at the pedigree. If individual 3 marries a carrier for cystic fibrosis, what would be the chance of cystic fibrosis in their children?A. 75% carrier, 25% cystic fibrosisB. 25% normal, 50% carrier, 25% cystic fibrosisC. 75% cystic fibrosis, 25% carrierD. 50% carrier, 50% cystic fibrosis

FREE Expert Solution

From the pedigree, it can be known that Individual 3, being affected by cystic fibrosis, is a homozygous recessive for that trait. If we cross him with a carrier of the disease, the chances of the progeny is shown in the Punnet square below:

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Problem Details

Look at the pedigree. If individual 3 marries a carrier for cystic fibrosis, what would be the chance of cystic fibrosis in their children?

A. 75% carrier, 25% cystic fibrosis

B. 25% normal, 50% carrier, 25% cystic fibrosis

C. 75% cystic fibrosis, 25% carrier

D. 50% carrier, 50% cystic fibrosis

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Genetic Counseling concept. You can view video lessons to learn Genetic Counseling. Or if you need more Genetic Counseling practice, you can also practice Genetic Counseling practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Naoum's class at CSU.