A female with cystic fibrosis marries a man who is heterozygous for Cystic fibrosis. Cystic fibrosis is a recessive autosomal disorder.
Do factorial analysis to show if their offsprings will suffer from cystic fibrosis

Every person has two copies of the cystic fibrosis transmembrane conductance regulator (CFTR) gene. A person must inherit two copies of the CFTR gene that contain mutations -- one copy from each parent -- to have cystic fibrosis..

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during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.