Khan Academy: Chromosomal Crossover in Meiosis I

Learn how homologous chromosomes exchange fragments in prophase I, tetrads, chiasmata, and alleles. [12:15]

Video lesson features a discussion of yeast and cell signaling in yeast reproduction. [8:02]

Video lecture explores the phases of Meiosis I: prophase 1, metaphase 1, anaphase 1, and telophase 1. It also investigates how homologous chromosomes separate into two sets. [9:44]

In this video, David from Khan Academy explains how to find the tension in a string that is whirling a yo-yo in a vertical circle. [10:30]

Is post-stroke inflammation common? Khan Academy fills us in with what it is and why it occurs. [5:55]

A video introducing the IUPAC Nomenclature System to understand how to name organic molecules. [12:40]

Jay explains how to use IUPAC rules to name linear, branched, and cyclic hydrocarbons. [12:36]

[Free Registration/Login may be required to access all resource tools.] How do you make a cell with half the DNA? Meiosis. This activity outlines the phases of meiosis, provides an overview of sexual reproduction, and describe how...

In this video module explore how equilibrium in a chemical reaction is defined as when the rate going forward is equal to the rate of the reverse reaction. Also learn how to calculate the equilibrium constant by knowing the concentration...

In this video, David from Khan Academy explains how to solve for the tension and speed of a mass swinging at an angle in a horizontal circle. [12:38]