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Pedigrees Google Slides - Free Printable

Educational worksheet: Pedigrees Google Slides. Download and print for classroom or home learning activities.

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Final Answer:
ff

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Explanation:
- Cystic fibrosis is a recessive disease. That means you need two copies of the bad gene (f) to have the disease.
- Individual II-3 is colored blue — that means they HAVE cystic fibrosis.
- So, their genotype must be “ff” — two copies of the disease allele.
- If they had even one normal gene (F), they wouldn’t have the disease. But they do have it, so both genes are “f”.

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Parent Tip: Review the logic above to help your child master the concept of pedigree practice worksheet.

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