Asexual and Sexual Reproduction
Project: Nondisjunction Dysfunction
How many pairs of human chromosomes are usually present?
Human Chromosomes
All of the normal human chromosomes are shown here. How many pairs are usually present?
Teacher Note
Purpose: to gauge student understanding of nondisjunction and problems arising from the incorrect number of chromosomes. Suggested use: small group project.
Nondisjunctionglossary term (opens in a new window) is the failure of sister chromatids to separate normally during cell division, resulting in cells with an abnormal number of chromosomes (aneuploidyglossary term (opens in a new window)).
Use the Internet to research Down syndrome, one of the diseases that can arise from nondisjunction in humans.
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<div tinymce="true" use-dimensions="false">Explain the type of nondisjunction that results in Down syndrome, including the phase of cell division in which it occurs and the particular chromosome that it affects.<br></div>Explain the type of nondisjunction that results in Down syndrome, including the phase of cell division in which it occurs and the particular chromosome that it affects.Press Space or enter key to Enter Text
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<div tinymce="true" use-dimensions="false">Describe the results of Down syndrome, both in terms of pregnancies and for people born with the disease.<br></div>Describe the results of Down syndrome, both in terms of pregnancies and for people born with the disease.Press Space or enter key to Enter Text
