This animation explains how Nettie Stevens research on meal worms unlocked the chromosomal basis of gender.

This is an excellent PowerPoint presentation that explains what chromosomes are. Many slides are also accompanied by detailed notes.

The scientists and experiments that discovered that DNA is coiled into chromosomes are the topic of this article. Article includes animations, pictures, video, biographical information, and quiz questions that are accessed by clicking on...

[Free Registration/Login may be required to access all resource tools.] Covers human autosomes and sex chromosomes.

This is a ten-question quiz pertaining to chromosomal inheritance.

Find out about the chromosome karyotype and how that identifies a human as a human. [0:46]

[Free Registration/Login may be required to access all resource tools.] An introduction to chromosomes.

Flip this interactive card to start learning about chromosomes, tiny, spaghetti-like packages of information. Answer multiple-choice and fact-or-fiction questions and review some fast facts about chromosomes.

The sequence of DNA that we inherit from our parents encodes directions for making our cells and giving us specific traits. Robin Ball explains how the secret lies in X chromosome inactivation.

This map from Access Excellence shows human chromosome pairs. The site includes a short description of chromosome structure, staining of chromosomes and karyotypes.

Find out how scientists read human chromosomes using three features: size, banding pattern, and centromere position.

Try these five self-checking quiz questions over chromosomes and human heredity. Click on the hints to see information about each questiion.

A self paced tutorial covering chromosomal testing and the many types of conditions resulting from chromosome abnormalities.

Alfred Sturtevant will describe his gene mapping research with fruit flies. This animated explanation will show how he bred fruit flies to determine the proximity of genes.

[Free Registration/Login may be required to access all resource tools.] Some children are born with genetic defects that are not carried by a single gene. Instead, an error in a larger part of the chromosome or even in an entire...

Read this passage and study the graphic to complete the five-question quiz related to the Chronic myelogenous leukemia and Philadelphia Chromosome.

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....

This game has students matching pairs of chromosomes to determine if there are any extras, indicating Down Syndrome.

Discover what you know about chromosomes by taking this post test.

Discover what you know about chromosomes by taking this pre test.

This site opens with an excellent introduction to Cytogenetics. Explore this site to learn about chromosomes, human karyotypes and more.

Drag and match the chromosome pairs to organize this human karyotype profile.

Thomas Hunt Morgan will explain the research he did to determine that some traits are linked to the sex of an individual.

At this site from The Nobel Foundation you can read about Thomas Hunt Morgan, the scientist who won the Nobel Prize in Medicine "for his discoveries concerning the role played by the chromosome in heredity." This website is organized...