Two phenotypically normal parents have a child with CF. i. What are the genotypes of each parent? ii. What is the probability that their next child has cystic fibrosis? Explain and complete a Punnett square.

To first dive into your question, here are some vocabulary terms that I will be using and will be helpful to you as well.

We know that if both of the parents are phenotypically normal, there is no way that they can be homozygous recessive (bb), or have cystic fibrosis. We also know that since they have a child with this disease, they can't be homozygous dominant (BB) either. This means that both parents have to be carriers (Bb) in order for them to have a child with cystic fibrosis.

Below I have attached a Punnett square with both of the heterozygous parents.

Each child they have will have a 1/4 or 25% chance of having cystic fibrosis.

it also supports my hypothesis. if you rest first you can squeeze the clothespin more times. from the data i collected the average of the eight people concluded exercise makes your muscles more fatigued and less able to squeeze the clothespin compared to resting before squeezing.

i wish i could with all of them i can barley see the first one so here's the answer to the first one b