Questions related to processes of cell division, differentiation, and specialization.

Within every cell in our body, two copies of a tumor suppressor gene called BRCA1 are tasked with regulating the speed at which cells divide. This learning module explains how these genes can sometimes mutate, making those cells less...

This site provides simple diagrams on all major topics in cell biology, genetics and biotechnology.

[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...

This informative resource features an overview of genetic material: DNA, chromosomes, genomes, homologous chromosomes, sister chromatids, and haploid/diploid.

See how cell division is essential for healthy growth of an organism, and how complex genetic mechanisms have evolved to switch cell division on and off at the proper time for normal development. [0:50]

Chromosomes are made from DNA. Genes are short sections of DNA. Genetically identical cells are produced by a type of cell division called mitosis. In sexual reproduction, a male gamete fuses with a female gamete to produce a new cell....

[Free Registration/Login may be required to access all resource tools.] During mitosis, the DNA in a nucleus must replicate. The copied DNA is divided into two genetically identical sets, so that after cytokinesis or cell division, each...

This slideshow explains the process of how a neuron communicates.

In this unit students will identify different kinds of genetic traits and how they are passed on from generation to generation. It contains 18 interactive activities.

Tutorial examines how a cell divides to make two genetically identical cells and explores the four basic phases: prophase, metaphase, anaphase, and telophase.

A biology course for high school students.

[Free Registration/Login may be required to access all resource tools.] Cancer is a disease that causes cells to divide out of control. Normally, the body has systems that prevent cells from dividing out of control. But in the case of...

Key facts about Down Syndrome are available on this page--just roll over the icons. For more detailed information, use the left navigation to explore causes, diagnosis, treatment, and more.