Cystic fibrosis is caused by the allele f, which is completely recessive to the normal dominant allele f. consider a couple with the genotype ff. what is the chance that their first child will develop cystic fibrosis?

1/4

Explanation:

Given that the disease cystic fibrosis is caused by a recessive allele (f), the individuals with genotype "ff" will express the disease. Both "FF and Ff" genotype will give the individuals a normal phenotype.

Both the parents are carrier (Ff) for the disease. They have 3/4 probability of getting a healthy child and 1/4 probability of getting a child with cystic fibrosis.

videntify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.