06:21
When Mom's DNA Calls the Shots: Genetic Maternal Effects
06:20
Lethal Alleles: Recessive and Dominant Lethals with Examples
06:54
Expect the Unexpected Phenotype: Penetrance and Expressivity
10:38
The trp Operon Simplified: Repression and Attenuation
03:24
What Does Upstream Mean on DNA and RNA?
03:12
Genotype and Phenotype Explained! With Examples
06:26
Chargaff's Rules: Review and Practice
06:59
Label a Transcription Bubble: direction, 5' and 3', strand names
11:48
Operons: Positive, Negative, Inducible, and Repressible! [Gene Regulation]
05:13
Leading and Lagging Strands - What's the Difference? Label Leading and Lagging Strands!
08:44
DNA or Protein? How Hershey and Chase Changed Biology
10:45
DNA vs RNA: 7 Key Differences!
16:19
Wobble Pairing: When Codons and Anticodons Break the Rules!
05:39
Why Thymine in DNA but Uracil in RNA?
06:46
7 Must-Know Parts of DNA Structure
10:01
Label a DNA Replication Fork: A Guide to the Proteins and DNA Strands
07:40
17 Essential Genetics Terms for Students
04:54
Template Strand, Coding Strand, Sense Strand...What's the Difference?
03:51
Common Mistakes with Multiple Alleles - and How to Avoid Them!
06:54
From Sample to Identity - DNA Profiling
05:48
Why Are Some Alleles Dominant or Recessive?
05:01
Natural Selection: Stabilizing, Disruptive, and Directional Selection
03:37
Building Blocks: Amino Acid Structure and Peptide Bonds Explained
04:35
Know these Differences: Mitosis and Meiosis! [AP Bio, IB Bio]
04:34
What is a Monosomy or Trisomy? Aneupoidy Explained!
04:12
Euploidy: What is Haploid, Diploid, Triploid (n, 2n, 3n)?
03:50
What Are Homologous Chromosomes?
04:15
Sister Chromatids and Chromosome Replication - What and When?
04:34
What Are Redox Reactions?
06:15
Where the Magic Happens: Review Cellular Respiration Stages and Locations
04:55
What do 5' and 3' mean on DNA and RNA?
05:51
Codons and Anticodons Explained
09:19
Practice Problems WORKED - Codons, Transcription and Translation (Intro Biology)
06:11
Unlock the Code! Practice Using a Codon Table
06:39
Water Properties - Adhesion - Cohesion - Surface Tension - Capillary Action (Intro Biology)
10:53
Water Molecule Structure: Polar Bonds and Partial Charges
10:29
Water Misconceptions - Polar Bonds - Hydrogen Bonds (Intro Biology)
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About
Sarah | Your friendly, online, experienced biology instructor (🧬PhD)
Hi, biology friends! I’m Sarah, your other biology professor. I’ve taught a bunch of different college biology courses, and I’m sharing my tips here on my channel! We’re taking the most frustrating topics and breaking them down - clearing up the tricky parts, and helping you to avoid some common exam mistakes.
💡 Content level: Intro College Biology, Advanced High School Biology (AP Biology, IB Biology)
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