Question

Cystic Fibrosis is a genetic disorder caused by a recessive allele. Mr and Mrs Jones are carriers of the cystic fibrosis gene.
1) State the genotype of Mr and Mrs Jones (use symbol A for dominant allele and a for recessive allele)
2) Draw a punnet square to show the genotype of their potential offspring.
3) State the genotype for the offspring with cystic fibrosis.
4) State the probability of having a child with cystic fibrosis

Answer 1

Answer:

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Cystic fibrosis is an example of a recessive disease. That means a person must have a mutation in both copies of the CFTR gene to have CF. If someone has a mutation in only one copy of the CFTR gene and the other copy is normal, he or she does not have CF and is a CF carrier......

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