🧬 Part 1: Genetics Fundamentals

1. Define the following key genetics terms:

Gene: ________________________________________________

Chromosome: ________________________________________________

DNA: ________________________________________________

Allele: ________________________________________________

2. Circle the correct answer for each statement:

DNA is found in the:

Nucleus

Cytoplasm

Cell membrane

Mitochondria only

Meiosis produces:

2 diploid cells

4 haploid cells

4 diploid cells

2 haploid cells

3. Explain the difference between mitosis and meiosis:

🔬 Part 2: Mendelian Inheritance

4. Complete the Punnett square for a cross between two heterozygous brown-eyed parents (Bb x Bb):

5. Based on your Punnett square above, what is the probability of:

Brown eyes (dominant): _______ %

Blue eyes (recessive): _______ %

Genotype ratio: BB : Bb : bb = _____ : _____ : _____

6. Circle the correct terms to complete the statements:

An organism with two identical alleles is called:

Homozygous

Heterozygous

Dominant

Recessive

The physical appearance of an organism is its:

Genotype

Phenotype

Allele

Chromosome

📊 Part 3: Pedigree Analysis

7. Analyse the pedigree diagram below and answer the questions:

Note: Draw a simple 3-generation pedigree showing inheritance of a recessive trait in the box above

8. Based on your pedigree analysis:

Is the trait dominant or recessive? _________________

How can you tell? ________________________________________________

9. Check all individuals in a pedigree that could be carriers of a recessive trait:

Affected individuals

Unaffected parents of affected children

Unaffected children of affected parents

All unaffected individuals

🌏 Part 4: Real-World Applications

10. Match the genetic applications with their descriptions:

1. Gene therapy

2. Genetic testing

3. Selective breeding

4. DNA fingerprinting

A. Identifying individuals using genetic markers

B. Treating diseases by introducing healthy genes

C. Choosing organisms with desired traits to reproduce

D. Screening for genetic disorders or predispositions

11. List three ethical considerations related to genetic testing:

12. How might understanding genetics impact future career choices? Give two examples:

🤔 Part 5: Critical Thinking and Reflection

13. Explain how genetics knowledge has influenced ONE of the following areas:

Medicine

Agriculture

Conservation

Forensic science

14. What genetics concept did you find most interesting or challenging during this unit? Explain why:

15. How has your understanding of inheritance and heredity changed from the beginning of this unit?

🎯 Part 6: Exit Ticket Summary

16. In your own words, explain how DNA, genes, and chromosomes work together in heredity:

17. Predict the offspring from this cross: Tall plant (TT) × Short plant (tt)

Genotype of all offspring: _________

Phenotype of all offspring: _________

Percentage showing dominant trait: _______ %

18. Name one ethical issue related to genetics and briefly state your opinion:

Ethical issue: ________________________________________________

Genetics Unit Review Worksheet

Genetics Unit Review Worksheet

🧬 Part 1: Genetics Fundamentals

🔬 Part 2: Mendelian Inheritance

📊 Part 3: Pedigree Analysis

🌏 Part 4: Real-World Applications

🤔 Part 5: Critical Thinking and Reflection

🎯 Part 6: Exit Ticket Summary

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