Cystic fibrosis is a genetic disorder caused by recessive alleles. Complete a Punnet square to show the inheritance of cystic fibrosis when both parents are carriers. State the probability of that a child born to these parents will have cystic fibrosis.

Punnet Square: to be shown on whiteboard. Percentage probability of inheritance: 25%

JR

Related Biology GCSE answers

All answers ▸

Tobacco smoke contains carbon monoxide. Explain how carbon monoxide affects a persons ability to exercise.


How is the structure of a capillary related to its function?


How is a sperm cell adapted to its role?


Using your knowledge of natural selection and speciation, suggest how new species can evolve from the same common ancestor.