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AP Biology Unit 5  ·  Sprint Review  ·  Free

AP Biology Unit 5 — Heredity & Genetics

One-page sprint review

Ten pages on meiosis, Mendelian and non-Mendelian genetics, chi-square testing, codominance vs incomplete dominance, and the language traps that cost points.

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Exam Weight
8–11%
MCQs
5–7
FRQ Appearance
Very Frequent
Sprint Time
~2 hours

Quick Glance — all topics in this unit

Priority, exam format, and the trap that most often costs the point. Transcribed from page 1 so this content is searchable.

TopicPriorityFormatKey trap / must-know
5.1–5.2 Meiosis & Diversity★★★MCQ, FRQMeiosis I = homologs separate; Meiosis II = sister chromatids separate. After Meiosis I: n chromosomes but STILL duplicated.
5.3 Mendelian Genetics★★★MCQ, Calc, FRQ'Fail to reject H₀' — NEVER say 'accept'. Chi-square p=0.05 critical value at df=3 is 7.815.
5.4 Non-Mendelian Genetics★★★MCQ, FRQIncomplete dominance = NEW intermediate phenotype; codominance = BOTH original phenotypes expressed. Mitochondrial = maternal only.
5.5 Environmental Effects★★MCQPhenotypic change ≠ genetic change; same genotype can produce different phenotypes in different environments.

Topic-by-topic visual review

Nine pages, one topic each. Open the PDF for print quality, or scroll to study on screen.

Cover: Unit 5 overview — calculation-heavy and concept-dense. Meiosis vs mitosis traps and chi-square language are the biggest losers of points.
Cover  ·  Unit 5 overview — calculation-heavy and concept-dense. Meiosis vs mitosis traps and chi-square language are the biggest losers of points.
5.1 Meiosis Stages: Meiosis I and II side by side: homolog separation vs sister-chromatid separation.
5.1 Meiosis Stages  ·  Meiosis I and II side by side: homolog separation vs sister-chromatid separation.
5.2 Sources of Genetic Diversity: Crossing over, independent assortment, random fertilization — the three diversity engines.
5.2 Sources of Genetic Diversity  ·  Crossing over, independent assortment, random fertilization — the three diversity engines.
5.3 Mendelian Genetics & Punnett: Monohybrid and dihybrid Punnett squares with phenotype ratios.
5.3 Mendelian Genetics & Punnett  ·  Monohybrid and dihybrid Punnett squares with phenotype ratios.
5.3 Chi-Square & Hypothesis Testing: Chi-square calculation, df rules, p=0.05 critical values, and the 'fail to reject' language.
5.3 Chi-Square & Hypothesis Testing  ·  Chi-square calculation, df rules, p=0.05 critical values, and the 'fail to reject' language.
5.4 Non-Mendelian Patterns: Incomplete dominance vs codominance vs multiple alleles vs polygenic, with examples.
5.4 Non-Mendelian Patterns  ·  Incomplete dominance vs codominance vs multiple alleles vs polygenic, with examples.
5.4 Sex-Linked & Pedigrees: X-linked inheritance, pedigree analysis, autosomal vs sex-linked rules.
5.4 Sex-Linked & Pedigrees  ·  X-linked inheritance, pedigree analysis, autosomal vs sex-linked rules.
5.4 Mitochondrial Inheritance: Maternal-only mitochondrial DNA inheritance — pedigree pattern and exceptions.
5.4 Mitochondrial Inheritance  ·  Maternal-only mitochondrial DNA inheritance — pedigree pattern and exceptions.
5.5 Environmental Effects on Phenotype: Hydrangea pH, temperature-sensitive coat color, and gene-by-environment interaction.
5.5 Environmental Effects on Phenotype  ·  Hydrangea pH, temperature-sensitive coat color, and gene-by-environment interaction.
Final Review — Traps + Checklist: The complete language and probability shortcut list for Unit 5 plus pre-exam self-check.
Final Review — Traps + Checklist  ·  The complete language and probability shortcut list for Unit 5 plus pre-exam self-check.

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