High School Science Reading: X-Inactivation and Twins - Sub Plan

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51 Ratings
Science With Mrs Lau
Grade Levels
9th - 12th
Resource Type
Formats Included
  • PDF
6 pages
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Science With Mrs Lau

What educators are saying

I used this as a piece of extension work for my students. They were truly facinated by it. Thank you.
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  1. As a science teacher, I know how hard it is to find a meaningful sub plan that a substitute can complete with your class. Why not choose science literacy reading strategies as the lesson goal every time you have to be out of the classroom?This Bundle contains all six of my best selling science read
    Price $18.40Original Price $23.00Save $4.60


Science literacy reading strategies are a great skill to teach when you have to be out. Good science reading at the high school level is difficult to find! Science teachers struggle to find lessons a substitute could help students do and here is a lesson they can!

Please note that this reading is shorter than my other science readings and is ideal for a shorter time frame. It works great for a fun lesson on a shortened class period day!

This mini-reading and carefully crafted diagram will answer a few questions all high school biology teachers get:

“How are identical and fraternal twins different?”

“Are identical twins truly IDENTICAL?”

This reading also explains the X inactivation process, a process that will fascinate your students and extend your students’ understanding past what the typical high school biology textbook covers. Epigenetics is an exciting and new field that your students will encounter often in the news and in their every day lives.

I suggest that you give this as a relatively challenging reading assignment after they have studied genetics. You could use it as a substitute plan if your students have been prepped a little beforehand.

Lesson Contents:

Page 1: Colorful Reading and Diagram

Page 2: Reading and Diagram in Black and White

Page 3: Seven reading questions and one extension internet research question

Page 4: Answer Key

Page 5: Teacher Instructions and Terms of Use

This lesson also comes in a bundle of 6 science readings! Click here to see the money-saving bundle!

If you want more Science Literacy Readings, check out my other readings!

Are there Prions in our Milk?

H1N1 Virus on an Airplane!

Can Cat Parasites in Your Brain Cause Bad Driving?

Zombie Ants and Fungal Parasites

Great White Shark Transcriptome

Contact Us!

If you have any questions or concerns, please reach out to us on the question and answer section of my store and we will get back to you quickly!

Terms of Use:

Purchasing my teaching resources allows you to:

* make copies for your own classes only.

* place this file on your own password-protected class page or server (Blackboard, Google Drive, etc) AS LONG AS no other teacher has access to that class webpage. This resource is for you, the purchaser, alone.

You are not allowed to distribute this digital resource to other teachers or post this resource on any webpage or server that is available for public view. If you and a team of teachers would like to use this resource together, please purchase additional licenses on the resource purchase page.

Failure to comply with these terms of use is a copyright infringement and a violation of the Digital Millennium Copyright Act (DMCA). Clipart and elements found in this PDF are copyrighted and cannot be extracted and used outside of this file without permission or license.

Files are partially or fully non-editable to protect the images that are copyrighted and purchased through licenses. Thanks for understanding!

© Bethany Lau 

All Rights Reserved.

Total Pages
6 pages
Answer Key
Teaching Duration
30 minutes
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to see state-specific standards (only available in the US).
Determine the central ideas or conclusions of a text; trace the text’s explanation or depiction of a complex process, phenomenon, or concept; provide an accurate summary of the text.
Determine the meaning of symbols, key terms, and other domain-specific words and phrases as they are used in a specific scientific or technical context relevant to grades 9–10 texts and topics.
Analyze the structure of the relationships among concepts in a text, including relationships among key terms (e.g., force, friction, reaction force, energy).
By the end of grade 10, read and comprehend science/technical texts in the grades 9–10 text complexity band independently and proficiently.


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