Laney Lee

Co-dominance, Incomplete Dominance, Blood Types – Practice Worksheet



Extend your unit on inheritance, heredity, and Punnett squares with this ready to use worksheet on co-dominance, incomplete dominance, and blood types. This resource is perfect follow up to simple Mendelian genetics and monohybrid crosses.


This co-dominance, incomplete dominance, and blood types worksheet includes 5 page genetics practice covering co and incomplete dominance plus a short reading passage describing the inheritance types and questions of all levels.


3 pages of this product cover blood types alone, and can be split into two separate worksheets if desired.


Who is this resource for?

This resource can be used by classroom teachers, tutors, and parents of students in grades 6-9. It provides a variety of practice covering the mentioned topics.


Uses for this Co-dominance, Incomplete Dominance, and Blood Types worksheet product:

  • Emergency Sub Plans
  • An independent work station in a set of stations
  • Differentiation – Assign this practice as reteaching for students who have yet to show mastery.
  • Homework
  • Creation of Independent Work Packet for students who are not able to be present for direct instruction.
  • Extension activity for early finishers or for students who show a special interest in the topic
  • Use as a square on a Choice Board
  • Interactive Notebooks: Print 2 pages in one and cut apart. Glue mini pages into notebooks with room for annotations on the side
  • Interactive Notebooks: Print entire PDF as a mini booklet and add to notebooks using these simple instructions.


What’s Included?

Purchase includes a printable PDF file in color with answer key. On page 2 of this resource you will find a link to a student friendly Google Doc version of this file. You will be able to copy this file and use it with Google Classroom or any other paperless initiative.


Please take a look at the preview file to see more of this resource.



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NGSS Standards covered by this worksheet on co-dominance, incomplete dominance, and blood types :

HS-LS3-2 Make and defend a claim based on evidence that inheritable genetic variations may result from (1) new genetic combinations through meiosis, (2) viable errors occurring during replication, and/or (3) mutations caused by environmental factors. Emphasis is on using data to support arguments for the way variation occurs. Assessment does not include the phases of meiosis or the biochemical mechanism of specific steps in the process.

HS-LS3-3 Apply concepts of statistics and probability to explain the variation and distribution of expressed traits in a population. Emphasis is on the use of mathematics to describe the probability of traits as it relates to genetic and environmental factors in the expression of traits. Assessment does not include Hardy-Weinberg calculations.


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