Khan Academy
Khan Academy: Allele Frequency
Learn about allele frequencies in populations and how they differ from genotype frequencies. [7:27]
Sophia Learning
Sophia: Predicting the Inheritance of Traits With Genes
This lesson will discuss how scientists use dominant and recessive genes to predict inherited traits of offspring.
Khan Academy
Khan Academy: Alleles and Genes
Understand how a gene is a stretch of DNA on a chromosome. Find out about alleles in their role as versions sequence variants of a gene. [8:18]
Khan Academy
Khan Academy: Alleles and Genes
A gene as a stretch of DNA on a chromosome. Alleles as versions (sequence variants) of a gene. [8:18]
Khan Academy
Khan Academy: Allele Frequency
Allele frequencies in populations and how they differ from genotype frequencies. [7:26]
Khan Academy
Khan Academy: Reproduction and Cell Division: Chromosomal Crossover in Meiosis I
Learn how homologous chromosomes exchange fragments in prophase I, tetrads, chiasmata, and alleles. [12:15]
Khan Academy
Khan Academy: Boveri Sutton Chromosome Theory
Overview of how chromosomes were first proposed as the carriers of Mendel's 'heritable factors' (what we now call 'genes'). [10:58]