Content Objective: Describe the process of spermatogenesis and oogenesis and the relationship between these processes and meiosis.
Language Objective: Compare and contrast the process and locations of spermatogenesis and oogenesis in males and females.
Book Reference:
479 - 485
Syllabus Details:
Understandings
Fusion of gametes from different parents promotes genetic variation
Fusion of gametes results in diploid zygotes with two alleles of each gene that may be the same allele or different alleles
Spermatogenesis and oogenesis both involve mitosis, cell growth, two divisions of meiosis and differentiation
Processes in spermatogenesis and oogenesis result in different numbers of gametes with different amounts of cytoplasm
Estrogen and progesterone cause pre-natal development of female reproductive organs and female secondary sexual characteristics during puberty
A gene on the Y chromosomes causes embryonic gonads to develop as testes and secretes testosterone
Testosterone causes pre-natal development of male genitalia and both sperm production and development of male secondary sexual characteristics during puberty
Application and Skills
Annotation of diagrams of seminiferous tubule and ovary to show the stages of gametogenesis
Annotations of diagrams of mature sperm and egg to indicate functions
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
Pearson book Pg. 479-485
Bioninja - Gamete Genesis
Bioninja - Structure of Egg and Sperm
Activity 2 - Drawings annotated diagrams of Sperm and Eggs
Activity 3 - Drawing annotated diagrams of seminiferous tubules and ovaries
Activity 4 - IB 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. Draw a labelled diagram of a mature sperm. (Total 3 marks)
3. (a) Draw the structure of a mature human egg. (4)
(b) Compare the processes of mitosis and meiosis. (6)
*Compare - similarities only - make a t-chart
(c) Explain how both meiosis and fertilization promote variation in a species that leads to natural selection. (6)
*Explain - what, why and/or how
A. Strengthen Your Skills
B. Expand Your Knowledge