Mendel's Law of Heredity

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In this video, Salman Khan of Khan Academy shows you how to do a Punnett Square.

In this video, Salman Khan of Khan Academy introduces the principles of heredity.

Biology Midterm Exam

This is a simple, but clean diagram of asexual reproduction of cells. You can clearly see chromosomes, as well as easily define the different stages.

An explanation of the various types of crosses and inheritanc patterns, including problem sets and tutorials.

This is a great website for students just beginning to learn about meiosis. There are no ads, and the site is sharp, clean, with great diagrams and explanations.

An extensive online interactive resource for learning about various aspects of biology.

A very good tutorial on one of Mendel's classic dihybrid crosses, with two heterozygotic parents. It shows diagrams at each step, and explains the ratios of phenotypes.

A clear, but detailed, explanation of epistatis that includes numerous well-explained examples.

Clear and concise description of The Law of Independent Assortment. Includes an example dihybrid cross.

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