Joshua and Bella have a son named Ian. Ian has been diagnosed with cystic fibrosis (CF).
Joshua and Bella are both healthy.
Bella’s parents are both healthy.
Joshua’s parents are both healthy.
Joshua’s sister, Sara, has cystic fibrosis.

If Josh also has a brother. What is the probability that he has cystic fibrosis? Explain with words and use of Punnett squares.

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.