Lesson Plans

Biology 5th Edition ©1999

by Campbell, Reece, Mitchell

Week 12: Development and the Basics of the Endocrine System

Chapter 21: The Genetic Basis of Development
Chapter 45: Chemical Signals in Animals (with respect to homeostasis and reproduction)

College Board Performance Objectives:

• Describe how the patterns of reproduction and development are regulated in plants and animals.
• Describe the adaptive significance of alternation of generations in the major plant groups.
• Explain how cell division, cell differentiation, and morphogenesis allow for embryonic development.
• Describe the structure and function of the endocrine system and relate it to the reproductive system.

College Board Lab Objectives:

Suggested Laboratory Experiments:

Resources:

• Chapter 21: The Genetic Basis of Development, pp. 388–411
• Chapter 45: Chemical Signals in Animals (with respect to homeostasis and reproduction, pp. 893–901)
• Instructor's Guide, pp. 315–323 and pp. 675–686
• Student Study Guide, pp. 156–163 and pp. 350–357
• Test Bank, pp. 249–257 and pp. 551–562
• Lab Manual: none
• CD-ROM: Chapters 21 and 45 include narrated presentations, activities, and links to the Internet.

Pacing Guide:

• Chapter 21: The Genetic Basis of Development—2 days
  Use a large glob of clay molded into the shape of a zygote. Show cleavage by breaking it into two cells, and then four, and eight, etc. Then show blastulation and gastrulation with many of the small cells. Holding your sleeve from the inside of a sweater sleeve, pull the sleeve through itself. Stop pulling when you are half-finished pulling it through. This is a good model of how gastrulation occurs and how the gut is formed.
• Chapter 45: Chemical Signals in Animals—2 days
  The students can pretend to be doctors that received blood test results for a patient. They need to determine which endocrine gland is not functioning properly and "what symptoms would a person have if" the person had the following blood test results:
  Patient 1: absence of releasing hormones
  Patient 2: absence of estrogen
  Patient 3: absence of FSH
  Patient 4: absence of LH
  Patient 5: absence of oxytocin
  Patient 6: absence of prolactin
• Biology AP* Lab 7- Genetics of Organisms, Begin Preparation—1 day
• Block Scheduling
  The Genetic Basis of Development can be accomplished in one block and Chemical Signals in Animals in one block.

Key Words:

Suggested Exercises:
Critical thinking questions and end-of-chapter activities are included in these exercises.

1. Challenge Questions, p. 411 #1
2. Science, Technology, and Society, p. 411 #1

Troubleshooting Tips/Error Traps:

• Stress that all cells in an organism have identical DNA because all cells originated for the zygote through mitosis, and the differentiation allows for the different cells. Control of transcription and translation is the key to differentiation.
• Understanding of the endocrine system is critical to learning about reproduction and homeostasis. Students very often have difficulty learning about the various glands. Teaching only the endocrine glands important to reproduction at this time makes it easier for them to understand the endocrinology and the menstrual cycle that is learned in the next week. The remainder of the chapter will be taught in Week 16.