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MDCAT · CHAPTER 10

Inheritance

Build genetic ratios from chromosome behaviour instead of memorising 3:1 and 9:3:3:1 as isolated formulas.

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01 / LESSON

Build the explanation.

  • Connect segregation and independent assortment with meiosis.
  • Construct mono- and dihybrid crosses systematically.
  • Recognise when linkage, codominance or sex linkage changes simple expectations.
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02 / NOTES

The essentials, in one place.

  • Segregation reflects separation of homologous chromosomes.
  • Genotype and phenotype ratios answer different questions.
  • Dihybrid probabilities can be multiplied only when events are independent.
  • Dominance pattern, linkage and sex linkage can change expected ratios.
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03 / ACTIVITY

Test the idea by changing something.

Predict the result first, run the activity, then explain what changed and why.

04 / DIAGRAM

Make the connections visible.

From genotype to offspring probability
01Parental genotype

Identify alleles carried by each parent.

02Meiosis

Separate alleles into valid gametes.

03Fertilisation

Combine one gamete from each parent.

04Classify offspring

Count genotype or phenotype outcomes.

Always list gametes before drawing a square; most errors begin with an impossible gamete.

Cover the labels, redraw the sequence or comparison, and explain each connection aloud.

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05 / QUIZ

Retrieve before you reread.

Build a timed test from this chapter’s 100 practice questions. Questions and options are shuffled; missed answers feed your revision notebook.

Original practice items, including related concept variants; not official examination questions.

06 / REVISION SHEET

Take the chapter away with you.

A print-friendly sheet brings together the learning targets, key points, concept diagram, written recall prompts and applied MCQs. Add the answer key when you are ready to check.

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