Mr. Adams' Washburn Site
  • Home
  • About

Topic 11.4:  Sexual Reproduction

Understandings:
  • 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.
  • Fertilization in animals can be internal or external.
  • Fertilization involves mechanisms that prevent polyspermy.
  • Implantation of the blastocysts in the endometrium is essential for the continuation of pregnancy.
  • HCG stimulates the ovary to secrete progesterone during early pregnancy.
  • The placenta facilitates the exchange of materials between the mother and fetus.
  • Estrogen and progesterone are secreted by the placenta once it has formed.
  • Birth is mediated by positive feedback involving estrogen and oxytocin.
Applications
  • The average 38-week pregnancy in humans can be positioned on a graph showing the correlation between animals’ size and development of the young at birth for other mammals.
Skills
  • Annotation of a diagram of seminiferous tubule and ovary to show the stages of gametogenesis.
  • Annotations of diagrams of mature sperm and egg to indicate functions.
Nature of Science
  • Assessing risks and benefits associated with scientific research-the risks to human male fertility were not adequately assessed before steroids related to progesterone and estrogen were released into the environment as a result of the use of female contraceptive pill.
Powerpoints
11.4 Notes
Homeworks
11.4_hmwk_2_page.docx
File Size: 1413 kb
File Type: docx
Download File

Sperm/Ovum Drawings
Helpful Links & Articles
Powered by Create your own unique website with customizable templates.
  • Home
  • About