Anchor Texts & Units
Unit 9
Cell Division
Holt Text:
Modern Biology (Owl)
Chapter 8
Inquiry Expectations Inquiry Expectations
B 1.1C
B 1.2C
Conduct scientific investigations. Students conduct investigations to determine the duration and sequence of each
mitotic stage in onion root tip cells. Students also use pollen grains to compare meiosis to mitosis.
Access information from multiple sources. Students develop an understanding of genetic continuity by accessing
scientific information from multiple sources.
Content Expectations (Priority standards are bolded)
B2.1C
Explain cell division, growth, and development as a consequence of an increase in cell number, cell size, and/or
cell products. (Sec 4.2 pg 72-73, 8.2 154-159, 8.3 161-164)
B2.1d
Describe how, through cell division, cells can become specialized for specific function. (Sec 4.2 pg 76)
Clarification: Limited to student recognition that the position of cells in early embryonic development influence their fate as
tissue types. These influences may include chemical signals from neighboring cells or specialization due to the genetic
switching on or off genes within the cell that cause it to make products that, in turn, further influence specific
developmental features.
B3.5d
Describe different reproductive strategies employed by various organisms and explain their advantages and disadvantages.
(Sec 8.2 pg 154-155)
B4.2A
Show that when mutations occur in sex cells, they can be passed on to offspring (inherited mutations), but if they occur in
other cells, they can be passed on to descendant cells only (non-inherited mutations). (Sec 8.2 161-164)
B4.3A
Compare and contrast the processes of cell division (mitosis and meiosis), particularly as those processes relate to
production of new cells and to passing on genetic information between generations. (Sec 8.2 156-159, Sec 8.3 161164)
Clarification: Limited to identification of pictures or diagrams of cell division and explanation that mitosis produces new
body cells and meiosis is responsible for the production of sex cells and passing genetic information on to the next
generation.
B4.3B
Explain why only mutations occurring in gametes (sex cells) can be passed on to offspring. (Sec 8.3 161-164)
B4.3C
Explain how it might be possible to identify genetic defects from just a karyotype of a few cells. (Sec 8.1 151-153)
Clarification: Limited to identification of Down syndrome and Turner’s syndrome as examples of genetic defects by
comparing those karyotypes to a normal karyotype.
B4.3d
Explain that the sorting and recombination of genes in sexual reproduction result in a great variety of possible
gene combinations from the offspring of two parents. (Sec 8.3 161-165)
Clarification: Recognize a diagram of meiosis and possible gene combinations that could occur through meiosis.
B4.3e
Recognize that genetic variation can occur from such processes as crossing over, jumping genes, and deletion and
duplication of genes. (Sec 8.3 161-165)
Clarification: Limited to recognizing diagrams or pictures that illustrate crossing over, duplication or deletion of parts of
chromosomes.
Predict how mutations may be transferred to progeny. (Ch 12 pg 239)
Clarification: Recognize how gene mutations such as sickle cell anemia and PKU can be passed on to offspring.
B4.3f
B4.4b:
Explain that gene mutation in a cell can result in uncontrolled cell division called cancer. Also know that exposure of cells
to certain chemicals and radiation increases mutations and thus increases the chance of cancer.
Clarification: Limited to recognizing that gene mutations that control cell division cause cancer. These mutations can be
passed on from parent to offspring, or more commonly can develop over the course of one’s life due to exposure to
chemicals and/or radiation.
B4.3g
Explain that cellular differentiation results from gene expression and/or environmental influence. (e.g. metamorphosis,
nutrition) (11.2 pg 223)
Tier 1
General Education
(Asexual Reproduction)
Essential Vocabulary
Part A
Tier 2
General Education / Cotaught
Essential Vocabulary
Part A
Cell Cycle*
Cell cycle foldable
Mitosis*
Mitosis sequencing
activity
Meiosis*
Meiosis foldable
Mitosis/Meiosis
Compare-contrast chart
(Sexual Reproduction)
Essential Vocabulary
Part B
*The committee recommends completing one POGIL within the unit.
Tier 3
Co-taught/ IEP/ EL
Essential Vocabulary
Part A