Curriculum Hotspot: Causes of Genetic VariationScience Office Anne Arundel County Public Schoolshttps://www.youtube.com/watch?v=esh-Uy2PBSs
Curriculum Hotspot: Causes of Genetic Variation

Vocabulary

  • Genetic Variation — The differences in DNA among individuals or the differences between populations.
  • Meiosis — A type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, producing gametes/sex cells and increasing genetic variation.
  • Mitosis — A type of cell division that results in two diploid daughter cells each genetically identical to the parent cell, producing somatic/body cells.
  • Somatic Cells — Any cell of a living organism other than the reproductive cells.
  • Gametes — A mature haploid male or female germ cell which is able to unite with another of the opposite sex in sexual reproduction to form a zygote.

Questions

Watch the video carefully and answer the following questions based on the information presented.
1.
According to the NGSS standard HS-LS3-2 presented in the video (0:29), what are the three main causes of inheritable genetic variations?
2.
The video uses a Venn diagram to compare mitosis and meiosis (1:14). State one key difference between the outputs of these two processes regarding genetic information.
3.
The video explains that while middle school students develop a “macroscopic understanding” of reproduction, high school students will look at genetic variation from a “microscopic level” (2:37). What specific processes are mentioned as being understood at this microscopic level?
4.
Which of the following is explicitly stated as an “Assessment Boundary” for HS-LS3-2, meaning students are not expected to know it for this standard (1:30-1:39)?
  1. The overall understanding of inputs and outputs of mitosis vs. meiosis.
  2. The use of data to support arguments for genetic variation.
  3. The phases of meiosis (e.g., interphase, prophase, metaphase, anaphase, telophase).
  4. The factors leading to inheritable genetic variation.
5.
The video presents three resource examples for teaching genetic variation: a Discovery Education video, a Meiosis Model activity, and an LSET Exit Ticket. Choose one of these resources and explain how it could be used to help students understand the causes of inheritable genetic variations, specifically addressing how it aligns with the high school standard HS-LS3-2.