Module 7 Introduction
Module 7 — Genetics at the Molecular Level: DNA and RNA at Work
Introduction
Mendel never had the opportunity to look through a microscope to see a cell. The discovery of cell nuclei and DNA occurred much later. In this module, you will learn about the historical events that led to the discovery of DNA and its structure. You will
learn how this amazingly simple and yet complicated structure codes for genetic traits, makes copies of itself, and directs the synthesis of protein (the major component of so many body parts such as hormones and enzymes). Some enzymes can clip
DNA apart, and some enzymes put it back together in new ways. You will explore this source of variation and its application in various technologies that have societal, economic, and environmental implications.
Furthermore, DNA has the tendency to stay the same, and yet it changes. These changes are random and can result in abnormalities. They can provide a source of variability that is the basis for evolution. You can trace relationships among organisms of different species by comparing their genetic material. The field of genetic technology rapidly is developing many ways to alter genetic traits, treat genetic diseases, and apply our understandings. These technologies often combine with societal, medical, ethical, and other issues, some of which you will examine.
This module explores one overarching question:
- Can we explain the transmission of traits at the molecular level by understanding the structure of DNA, its role in protein synthesis, and how it can mutate?
Suggested Timeline
This module has five lessons. Please use the following suggested timeline to help you keep on track. Keep in mind that the number of hours required on each lesson will vary among individuals. Some students may find that they need significantly more time
reviewing the course material; others who have completed this course before might require less time. Use the following table as a guide to set your own personal timeline to complete this course.
| Lesson | Topic |
Suggested Number of Hours
on the Lesson |
Equivalent Number of
Classes in School |
| 1 |
DNA Structure
|
5 hours
|
2 classes
|
| 2 |
DNA Replication
|
5 hours
|
2 classes
|
| 3 |
Protein Synthesis
|
9 hours
|
3 classes
|
| 4 |
Changes in Genetic Code
|
3 hours
|
1 class
|
| 5 |
Genetic Engineering
|
3 hours
|
1 class
|
If you plan to spend about 2 hours per day on this course, you might complete this module in about 2.5 weeks.
Assignments
There are three assignments in this module. Assignment 7A and 7B are computer graded and you will receive immediate feedback. Assignment 7C contains written response type questions and will not be computer graded.
|
Assignment
|
Topic |
Number of Questions
|
Total Marks
|
|
Assignment 7A
|
Lessons 1 ~ 3
|
39 Questions
|
41.5 Marks
|
|
Assignment 7B
|
Lessons 4 ~ 5
|
42 Questions
|
42 Marks
|
|
Assignment 7C (Written)
|
Lessons 1 ~ 5
|
19 Questions
|
47.5 Marks
|