Gce Model Questions Vol1 2025 Biology Question 10

Practice essay / theory question 10 from the 2025 Gce Model Questions Vol1 Biology examination. This question covers Mendelian Genetics, Genetic Linkage, Crossing‑over .

Gce Model Questions Vol1 2025 Biology Essay / Theory

Topics: Mendelian Genetics Genetic Linkage Crossing‑over

Question 10 GCE_MODEL_QUESTIONS_VOL1 • 2025 • BIOLOGY • essay

Explain the principles of Mendelian inheritance and how they are modified by genetic linkage and crossing‑over. Using a dihybrid cross involving two linked genes, predict the phenotypic ratios expected in the F2 generation.

Question Parts

( a )

State Mendel’s laws of inheritance and give a brief example of a monohybrid cross that yields a 3:1 phenotypic ratio.

( b )

Define genetic linkage and explain how crossing‑over can alter the expected segregation of linked genes.

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About This Question

This is Gce Model Questions Vol1 2025 Biology Question 10. It is one of the essay questions from the 2025 Gce Model Questions Vol1 Biology examination.

The question covers Mendelian Genetics, Genetic Linkage, Crossing‑over .

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