Science - 2019-20

BIO.5 b-c - Gametes & Cell Specialization

The student will investigate and understand common mechanisms of inheritance and protein synthesis. Key concepts include
b) gamete formation; and

c) cell specialization.

Bloom's Levels:  Analyze; Understand


Adopted: 2010

BIG IDEAS

  • All living things reproduce to produce more of their own kind.  
  • All cells come from other cells.
  • Reproduction is characteristic of living things and is essential for the survival of species.

  • I can explain how tumors grow.
  • I can explain why different organs perform different tasks.

UNDERSTANDING THE STANDARD

  • Mitosis produces two genetically identical cells. During mitosis, the nucleus of the cell divides, forming two nuclei with identical genetic information. Mitosis is referred to in the following stages: prophase, metaphase, anaphase, and telophase. 
  • Many organisms are capable of combining genetic information from two parents to produce offspring. Sex cells are produced through meiosis. This allows sexually reproducing organisms to produce genetically differing offspring, and maintain their number of chromosomes. Meiosis occurs in sexual reproduction when a diploid germ cell produces four haploid daughter cells that can mature to become gametes (sperm or egg). 
  • Genetically diverse populations are more likely to survive changing environments. Recombination and mutation provide for genetic diversity. Some new gene combinations have little effect, some can produce organisms that are better suited to their environments, and others can be deleterious.
  • Mitosis and meiosis refer to division of the nuclear material. Cytokinesis is the division of the cytoplasm and organelles. 
  • All living cells come from other living cells. A typical cell goes through a process of growth, development, and reproduction called the cell cycle. 
  • The many body cells of an organism can be specialized to perform different functions, even though they are all descended from a single cell and contain essentially the same genetic information.

ESSENTIALS

In order to meet this standard, it is expected that students will

b) create a diagram to model the stages of meiosis and explain the processes occurring at each stage.

c) describe the importance of cell specialization in the development of multicellular organisms.

KEY VOCABULARY

cell division, mitosis, cytokinesis, chromatid, centromere, interphase, cell cycle, prophase, centriole, spindle, metaphase, anaphase, telophase, cyclin, cancer


Updated: Dec 01, 2017