Module 5
1. Module 5
1.21. Lesson 5
Module 5—Cell Division: The Processes of Mitosis and Meiosis
Lesson 5—Cell Cycle Disorders and Genetic Testing
Get Focused
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Chromosome replication and separation does not always go according to the patterns that you have learned. Occasionally, the process falters, and the results can be dramatic: for example, Down syndrome, Klinefelter syndrome, or Turner syndrome. In this lesson you will learn about common disorders resulting from improper cell division and consider the ethical issues involved in prenatal genetic testing and work with embryonic cells.
In this lesson the following focusing questions will be examined:
- How do chromosome disorders occur, and why does their occurrence increase with maternal age?
- How can embryonic cells be used, and what technologies exist to test the genetic condition of an unborn fetus?
prenatal genetic testing: sampling and testing of embryonic or fetal cells to determine chromosome number and gender
Module 5: Lesson 5 Assignment
stem cell: an undifferentiated “generic” cell that can be coaxed into producing a number of different kinds of cells; present in embryonic blastocysts and also recently found in adults; potentially used to repair tissue and build replacement organs
Embryonic stem cell research is controversial due to the fact that the creation and termination of human blastocysts is used as a method of obtaining stem cells.
You will complete a project on nondisjunction and questions on stem cell research for assessment.
Download a copy of the Module 5: Lesson 5 Assignment to your computer now. You will receive further instructions on how to complete this assignment later in the lesson.
You must decide what to do with the questions that are not marked by the teacher.
Remember that these questions provide you with the practice and feedback that you need to successfully complete this course. You should respond to all of the questions and place those answers in your course folder.