Genes and heredity crossword: crossword puzzle for Grade 7, page 1 preview

Crossword puzzle · Science

Genes and heredity crossword · Grade 7

Solve a crossword of up to 15 words about genes and heredity from short definition clues. Builds vocabulary, spelling and reading for meaning.

Grade 7 · ages 12 to 13
Hard
15 to 20 minutes
1 page
Free

The answer key is a separate page for grown-ups. Sign in to download it.

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The crossword clues

Directions: Read each clue and write the answer in the grid, one letter in each box.

Across
3 The pair of alleles an organism has for a trait
4 One of the different versions of a gene
7 Having two different alleles for a trait
11 Grid used to predict the possible allele combinations of offspring (7, 6)
12 A characteristic, like eye color or leaf shape
Down
1 Molecule shaped like a twisted ladder that carries genetic instructions
2 Having two identical alleles for a trait
3 Section of DNA that codes for a trait
5 Twisted-ladder shape of a DNA molecule (6, 5)
6 The young produced by parents
8 Describes an allele whose trait is hidden unless two copies are present
9 The trait you can observe, such as flower color
10 Passing of traits from parents to their offspring

What your child practices

Your child builds vocabulary, spelling and reading for meaning.

Grades and ages: Grade 7, ages 12 to 13
Time: About 15 to 20 minutes
Subject: Science
Level: Hard for Grade 7
Answer key: Yes, for grown-ups who sign in
Printing: 1 page, US Letter or A4, low-ink option
Updated: October 15, 2026

How to use it

Read the first across clue together so the format is clear. Use a pencil so mistakes rub out easily, and check every answer at the end. It is one of the harder sheets for Grade 7, best once the basics of the topic are secure.

An answer key comes with it as a separate page that grown-ups download after signing in.

Tip for grown-ups: Use the letter count after each clue and any crossing letters when a clue gets stuck.

Done on paper? A grown-up can record it on the child's page in PlayOwl; downloading alone doesn't count as finished.