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  3. AP Biology CRAM – Chi-Square & Genetics Problems

ap biology cram – chi-square & genetics problems

originally streamed in 2019 with Caroline KoffkeTeacher
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Get ready for your AP Biology exam with this focused review of Big Ideas 1 and 2. Learn chi-square analysis step-by-step, tackle genetics problems with confidence, and review key concepts in evolution and cell communication. This cram session walks ...more

covered in this stream

units
Unit 5 – Heredity
topics
Chi Square AnalysisMendelian and Non-Mendelian Genetics and Chi Square5.3 Mendelian Genetics

timestamps

  • 0:00

    Cram Session Introduction

  • 0:35

    Prioritizing Questions

  • 1:07

    Study Schedule Tips

  • 1:38

    Test Day Advice

  • 2:09

    Multiple Choice Strategies

  • 2:41

    Grid-In Question Tips

  • 3:11

    Free Response Strategies

  • 3:43

    Limiting Response Length

  • 4:13

    Stubbornness in Testing

  • 4:44

    Free Response vs Multiple Choice

  • 5:15

    Strengths and Stress Management

  • 5:45

    Topics on the Exam

  • 6:47

    Big Idea 1 Topics

  • 7:18

    Big Idea 2 Topics

  • 7:51

    Presentation Links

  • 8:21

    Chi-Square Introduction

  • 8:52

    2013 Free Response Example

  • 9:22

    Chi-Square Steps Overview

  • 9:53

    Expected Values Explanation

  • 10:24

    Choice Chamber Setup

  • 10:56

    Banana Experiment Data

  • 11:26

    Fly Attraction Reasons

  • 11:57

    Observed Values

  • 12:27

    Null Hypothesis

  • 12:57

    Expected Distribution

  • 13:28

    Common Mistakes

  • 14:01

    Calculation Process

  • 14:32

    Chi-Square Value

  • 15:03

    Null in Genetics

  • 15:39

    Group Calculations

  • 16:10

    Interpreting Results

  • 16:41

    Rejecting Null Hypothesis

  • 17:12

    Expected Values Meaning

  • 17:42

    Genetics Null Example

  • 18:14

    Expected Not Always Equal

  • 18:45

    Phenotypic Ratios

  • 19:16

    Null Hypothesis Phrasing

  • 19:46

    Degrees of Freedom

  • 20:17

    Chi-Square Table

  • 20:48

    Critical Values

  • 21:19

    P-Value Selection

  • 21:50

    Degrees of Freedom Calculation

  • 22:21

    Critical Value Example

  • 22:52

    Rejecting Null

  • 23:22

    Remembering Rejection

  • 23:54

    Mathematical Interpretation

  • 24:55

    Degrees of Freedom Confirmation

  • 25:27

    Accepting vs Rejecting

  • 25:58

    Genetics Problem Setup

  • 26:30

    Predicting Exam Questions

  • 27:03

    Genetics Example Data

  • 27:36

    Total Observed

  • 28:08

    Punnett Square

  • 28:39

    Genotypic Ratios

  • 29:10

    Phenotypic Ratios

  • 29:40

    Expected Values Calculation

  • 30:12

    Proportion Setup

  • 30:43

    Fixing Errors

  • 31:15

    Green Expected

  • 31:45

    Checking Work

  • 32:16

    Math Calculations

  • 32:52

    Group Results

  • 33:24

    Critical Value Comparison

  • 33:56

    Rounding Advice

  • 34:27

    Micro vs Macro Evolution

  • 34:58

    Cell Communication Overview

  • 35:32

    Slide Access Instructions

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Study Content & Tools

Study GuidesFRQs + AI ScoringAP Essay Grader for StudentsAI Grading for TeachersPractice QuestionsGlossaryScore Calculators

Company

What's New?PricingBulk DiscountsTestimonialsFAQsEmail us

Resources

AP Exam Schedule 2027AP ClassesAP ClassroomEasiest AP ClassesHardest AP ClassesAP vs IBAP vs Dual EnrollmentAP vs Honors ClassesAP Scholar Awards

history

🌎 ap world history🇺🇸 ap us history🇪🇺 ap european history

social science

✊🏿 ap african american studies🗳️ ap comparative government🚜 ap human geography💶 ap macroeconomics🤑 ap microeconomics🧠 ap psychology👩🏾‍⚖️ ap us government

english & capstone

✍🏽 ap english language📚 ap english literature🔍 ap research💬 ap seminar

arts

🎨 ap art & design🖼️ ap art history🎵 ap music theory

science

🧬 ap biology🧪 ap chemistry♻️ ap environmental science🎡 ap physics 1🧲 ap physics 2💡 ap physics c: e&m⚙️ ap physics c: mechanics

math & computer science

🧮 ap calculus ab♾️ ap calculus bc📐 ap precalculus📊 ap statistics💻 ap computer science a⌨️ ap computer science p

world languages

🇨🇳 ap chinese🇫🇷 ap french🇩🇪 ap german🇮🇹 ap italian🇯🇵 ap japanese🏛️ ap latin🇪🇸 ap spanish language💃🏽 ap spanish literature

career kickstart

💼 ap business with personal finance🔒 ap cybersecurity

go beyond AP

high school exams

✏️ PSAT🎓 Digital SAT🎒 ACT

honors classes

🍬 honors algebra II🫀 honors anatomy🐇 honors biology👩🏽‍🔬 honors chemistry💲 honors economics📐 honors geometry⚾️ honors physics📏 honors pre-calculus📊 honors statistics🗳️ honors us government🇺🇸 honors us history🌎 honors world history

college classes

👩🏽‍🎤 arts👔 business🎤 communications🏗️ engineering📓 humanities➗ math🧑🏽‍🔬 science💶 social science

hs classes

🏛️ alabama history⛰️ appalachian studies🌴 california history🌍 earth science🌐 ethnic studies🐊 florida history🍑 georgia history🌎 global studies🌺 hawaiian studies📰 journalism🪶 native american studies🌵 new mexico history🤠 oklahoma history⚗️ physical science🎙️ speech and debate🤝 texas government🤠 texas history🌲 washington state history🕊️ world religions
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© 2026 Fiveable Inc. All rights reserved.

AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.