Cat worksheet for 3rd grade: inherited traits and variation
A one lesson worksheet (about 40 minutes) for third graders on inherited traits. Students read a short passage, study a pretend cat family in a data table, and use the data to show that kittens get traits from their parents and that kittens in one litter can still be different from each other. This supports NGSS 3-LS3-1: analyze and interpret data to provide evidence that plants and animals have traits inherited from parents and that variation of these traits exists in a group of similar organisms.
Teacher notes
- Objective: students use data to show that kittens share traits with their parents and that littermates vary.
- Materials: this printed page, pencils, colored pencils (optional).
- Important: the cat family below is made up for practice. It is a simple pattern exercise, not a real breeding record, and it does not try to teach how coat color genes work (genetic mechanisms are outside the 3-LS3-1 assessment boundary).
- Warm up (5 minutes): ask "Do you look exactly like anyone in your family? Do brothers and sisters always look the same?" Then switch to animals: NGSS asks for examples other than humans.
- Real science link: people have bred cats for chosen traits. Scientists have linked the folded ears of Scottish Fold cats to a single gene variant passed from parent to kitten, and the same variant is linked to painful problems in the cats' bones and joints. This makes a good discussion for older or advanced students: should people breed animals for a look that can hurt them?
Worksheet: the Whisker family
Name:
Read: A trait is something about a living thing, like its fur color or the shape of its ears. Many traits are inherited, which means they are passed from parents to their young. Kittens often look like their parents, but kittens in the same litter can look different from each other. These differences are called variation.
Study the data. This is a pretend cat family made up for this worksheet.
| Cat | Fur color | Fur pattern | Fur length | Ear shape |
|---|---|---|---|---|
| Mother (Maple) | Gray | Striped | Short | Pointed |
| Father (Pepper) | Black | Solid | Long | Pointed |
| Kitten 1 | Gray | Striped | Short | Pointed |
| Kitten 2 | Black | Solid | Short | Pointed |
| Kitten 3 | Gray | Solid | Long | Pointed |
| Kitten 4 | Black | Striped | Short | Pointed |
- Which trait is the same in every cat in the family?
- Which kitten looks most like its mother? Use the data to explain.
- Kitten 3 has long fur. Which parent also has long fur?
- Do all four kittens look the same? Give one example of variation from the table.
- Count: how many kittens have gray fur? How many have black fur? Make a tally chart.
- Write a claim: "Kittens get traits from ." Give one piece of evidence from the table.
- Think about it: Kitten 2 learned to come running when it hears a can opener. Is that a trait it inherited from its parents, or something it learned? Explain.
Answer key
- Ear shape: every cat has pointed ears.
- Kitten 1. It has the same fur color (gray), pattern (striped), length (short) and ear shape (pointed) as Maple.
- The father, Pepper.
- No. Examples: Kitten 1 is gray but Kitten 2 is black; Kitten 3 has long fur but the others have short fur; Kittens 1 and 4 are striped but Kittens 2 and 3 are solid.
- Gray: 2 (Kittens 1 and 3). Black: 2 (Kittens 2 and 4).
- "Kittens get traits from their parents." Evidence varies, for example: every kitten's fur color matches either the mother or the father; Kitten 3's long fur matches Pepper.
- Learned. Coming to the sound of a can opener is learned from experience, not passed down from parents. (This is a good bridge to 3-LS3-2, which is about how the environment can influence traits.)
Extend the lesson
- Have students design their own pretend cat family and swap with a partner to find shared traits and variation.
- Look at our cat breed guide with the class: each breed is a group of similar cats that share inherited traits, and many breeds also share inherited health risks.
- Pair with the cat fact sheet for a reading center, and add new words to a word wall from the vocabulary list.
Sources
- NGSS 3-LS3-1 Heredity: Inheritance and Variation of Traits
- Lipinski M.J. et al. (2008) The ascent of cat breeds: genetic evaluations of breeds and worldwide random-bred populations. Genomics 91(1):12 to 21
- Gandolfi B. et al. (2016) A dominant TRPV4 variant underlies osteochondrodysplasia in Scottish fold cats. Osteoarthritis and Cartilage 24(8):1441 to 1450
- International Cat Care: Scottish Fold osteochondrodysplasia
Cite this page
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APA (7th ed.)
MeowWise. (2026, October 8). Cat worksheet for 3rd grade: inherited traits and variation. https://meowwise.com/teachers/cat-worksheet-3rd-grade.html
MLA (9th ed.)
“Cat worksheet for 3rd grade: inherited traits and variation.” MeowWise, Joshua Israel Ventures LLC, 8 Oct. 2026, meowwise.com/teachers/cat-worksheet-3rd-grade.html.
Chicago (bibliography)
MeowWise. “Cat worksheet for 3rd grade: inherited traits and variation.” Joshua Israel Ventures LLC. Last modified October 8, 2026. https://meowwise.com/teachers/cat-worksheet-3rd-grade.html.