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Peer Review

1n, 2n, 1c, 2c... Cell ploidy made simple

Reviewed:

Mar 11, 2025 by Biology
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Ratings

Overall Rating: 4.2 stars
Content Quality: 4.5 stars
Effectiveness: 4.2 stars
Ease of Use: 4.2 stars
Overview:

Materials for an active and interactive lesson on idenitfying and distinguishing chromosome number from cell ploidy, and replicated and unreplicated chromosomes, using simple diagrams.

Type of Material:

Tutorial

Recommended Uses:

In or out of class as a lesson in ploidy.

Technical Requirements:

Ability to play .mov files.

Identify Major Learning Goals:

Major learning objective:

Given a diagram representing the chromosomes of a cell, determine:

  • the total number of chromosomes present;
  • whether the chromosomes are replicated or unreplicated;
  • the cell ploidy level (n, 2n, 3n, etc.);
  • the amount of DNA expressed as number of genomes, c, in the cell.
Target Student Population:

High School, College General Ed

Prerequisite Knowledge or Skills:

None.

Content Quality

Rating:
Strengths:

  • The content is accurate about ploidy and c, and uses appropriate examples.
  • As a tutorial on ploidy, the tutorial is complete.
  • Images are accurate in representing the concepts.
Concerns:

  • The concept of c is not explained in the tutorial video but must be understood by students to complete the tutorial worksheet.
  • The presentation is appropriate to high school, or possibly college for students with no prior biology education.

Potential Effectiveness as a Teaching Tool

Rating:
Strengths:

  • The images, pictures, and diagrams are effective in explaining a nuanced concept.
  • The worksheet gives educators an effective means for their students to progress through the tutorial and as an assessment.
  • A set of clicker questions is provided.
  • Keys to the worksheet and clicker questions is provided.
  • A student view is available.
Concerns:

  • The tutorial video has only static images not animations, but these are staged to demonstrate the concept sequentially.
  • The tutorial video is simple and easy to understand, however, the worksheet could have more scaffolding of the concepts.
  • Some critical thinking concepts could be presented the workshop.
  • The material is primarily one video with some text and images, There could be additional videos, articles, or further reading/viewing.

Ease of Use for Both Students and Faculty

Rating:
Strengths:

  • The resources are downloadable as well as viewable online.
  • The video is easy to run and pause.
  • The worksheet is easy to download or share.
  • The tutorial module can be saved to Google classroom.
Concerns:

  • The video does not have closed captioning or a transcript available.
  • Although student view hides the answer keys, students would be able to access these through the regular view without much trouble.
Other Issues and Comments:

  • Make a list of topics & sub-topics.
  • Please include tabs for navgitation of sub-topics in different pages.
  • The content needs more description.
Creative Commons:
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