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.

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

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

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.