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Unit 2:
Reproduction
Chapter 5: Cell Growth and
Reproduction
In this chapter students are introduced to the structure and function
of a cell. A historical overview outlining the development of
current cell theory is presented, affording students the opportunity
to understand the evolution of scientific theory. The balance
of the chapter focuses on the process of mitosis and its importance.
Students are given the opportunity to observe mitosis and to determine,
using prepared slides, the rate of cell division in onion root.
Mitosis as a means of reproduction is examined, as is the rate
of growth in plants and pattern of growth in humans.
Chapter 6: A Closer Look at Cell Division
Chapter 6 introduces students to DNA and its importance. Students
examine the structure, replication, and use of DNA in modern-day
forensics. The effect of mutation is examined using cystic fibrosis
and cancer as examples. Students are given the opportunity to
inhibit cell division in plants using pine needle extract and
also investigate factors that seem to increase mutations leading
to cancer. Cloning is introduced as a means of reproduction in
plants and animals. Students clone plant cuttings and learn about
recent advances in cloning technology.
Chapter 7: Sexual Reproduction and the Diversity of
Life
Chapter 7 focuses on sexual reproduction in plants and animals.
Students are introduced to various reproductive strategies used
in plant and animal kingdoms. Meiosis and its importance are examined
in detail. Students investigate and identify the sexual structures
of a flower. The remainder of the chapter emphasizes human reproduction.
Students gain an understanding of the process of gamete development
in males and females. The effect of hormones on the process of
female sex cell development is examined in detail. Errors in the
process of meiosis are presented. Using a karyotype chart, students
identify a genetic disorder.
Chapter 8: Zygotes and Development
Chapter 8 examines zygotes and the conditions that are necessary
for their development. Spore formation, seeds, eggs, marsupial
mammals, and placental mammals are among the topics. Students
investigate plant embryos using a bean and corn seed. The effect
of light, acidity, alkalinity, and temperature on seed germination
is examined. Eggs and embryo development are also explored through
laboratory investigation. Human reproduction from zygote to fetus
constitutes the remaining part of the chapter. Human conception
and human reproductive technologies are presented. The healthy
development of the human embryo is discussed at length.
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