Figure 1 shows the inheritance of cystic fibrosis in a family.
Persons 5 and 8 in Figure 1 are expecting a child.
Determine the probability that the child will be a girl with cystic fibrosis.
You should:
- identify the genotypes of Person 5 and Person 8
- draw a Punnett square diagram showing the possible offspring genotypes
- identify the phenotype of each offspring genotype
- calculate the final probability using the symbols:
- FFF = normal (dominant) allele
- fff = mutated cystic fibrosis (recessive) allele