Content Objective: Describe the process of spermatogenesis and oogenesis and the relationship between these processes and meiosis and how Polyspermy is prevented.
Language Objective: Compare and contrast the process and locations of spermatogenesis and oogenesis in males and females.
Syllabus Details:
Understandings
D3.1.13 (HL) —Control of the developmental changes of puberty by gonadotropin-releasing hormone and steroid sex hormones -"Limit to the increased release of gonadotropin-releasing hormone (GnRH) by the hypothalamus in childhood triggering the onset of increased luteinizing hormone (LH) and follicle-stimulating hormone (FSH) release. Ultimately the increased sex hormone production leads to the changes associated with puberty."
D3.1.14 (HL)—Spermatogenesis and oogenesis in humans "Include mitosis, cell growth, two divisions of meiosis and differentiation. Students should understand how gametogenesis, in typical male and female bodies, results in different numbers of sperm and eggs, and different amounts of cytoplasm."
D3.1.15 (HL)—Mechanisms to prevent polyspermy - "The acrosome reaction allows a sperm to penetrate the zona pellucida and the cortical reaction prevents other sperm from passing through."
Video Links
Spermatogenesis - Thinkwell (9:30)
Spermatogenesis - A DP focus (13:00)
Oogenesis - Basics Video (8 minutes)
Oogenesis - A more of a DP focus (7:30 minutes)
Reading Links
Bioninja - Gamete Genesis
Bioninja - Structure of Egg and Sperm
Activity 1 - Notes
Click Here - Stop after you finish Polyspermy
Activity 2 - IB Practice Questions
1. Compare and contrast the processes of spermatogenesis and oogenesis. (Total 7 marks)
*Compare and Contrast - similarities and differences - make a T-chart
2. Compare the processes of mitosis and meiosis. (6)
*Compare - similarities only - make a t-chart
A. Strengthen Your Skills
B. Expand Your Knowledge