Classical and molecular genetics
8 videos
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8
AP Biology - Classical and Molecular Genetics: The Big Picture
This video traces the history of genetics from Mendel's pea plant experiments in the 1860s to the discovery of DNA, showing how classical and molecular genetics connect.
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AP Biology - Mendelian Genetics: Dominance, Segregation, and Independent Assortment
Learn Mendel's three laws of inheritance: dominance, segregation, and independent assortment. Understand genotype vs phenotype using pea plant examples.
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AP Biology - Punnett Squares: Predicting Offspring Genotypes and Phenotypes
Learn how to use a Punnett square to predict offspring traits by combining parental alleles. Covers genotypic and phenotypic ratios with real genetic cross examples.
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AP Biology - Chromosome Theory of Inheritance: From Mendel to Morgan
This video explains how scientists discovered that genes are located on chromosomes, from Mendel's laws to Morgan's fruit fly experiments proving the chromosome theory of inheritance.
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AP Biology - Sex-Linked Traits and X-Linked Inheritance
This video explains why color blindness is more common in men due to X-linked inheritance, hemizygosity in males, and X-inactivation creating genetic mosaics in females.
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AP Biology - Genes vs. Alleles: What's the Difference?
Learn the key difference between genes and alleles. Genes are DNA instructions for traits, while alleles are specific versions of those genes you inherit from parents.
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AP Biology - DNA Structure: The Molecule Behind Heredity
An educational overview of DNA structure, explaining the double helix, sugar-phosphate backbone, complementary base pairing, and how genetic information is stored and copied.
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AP Biology - The Central Dogma: Replication, Transcription, and Translation
Learn how DNA becomes protein through the central dogma: replication, transcription, and translation. Discover how genetic information flows from DNA to RNA to protein.