Free Printable WorksheetScienceGrade 6Science CurriculumSCI.6.93

6.93 Genes, Alleles, Genotype, and Phenotype Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Grade 6 Science worksheet provides structured practice on 6.93 Genes, Alleles, Genotype, and Phenotype. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Genes, Alleles, Genotype, and Phenotype - Which statement best describes genes, alleles, genotype, and phenotype? (NGSS MS‑LS3‑1)

Whether you are an educator preparing classroom handouts, a tutor reinforcing weekly topics, or a parent supporting homeschool learning, this printable resource gives students the deliberate practice required to achieve subject fluency and master state standards.

Grade

Grade 6

Subject

Science

Domain

Science Curriculum

Formats

PDF & DOCX

Sample Practice Problems

Preview the types of problems and questions covered in this worksheet

Below are sample questions representative of the exercises included on this worksheet and related 6.93 Genes, Alleles, Genotype, and Phenotype skill assessments:

Problem 1Difficulty: Mastery

Two genetically identical oak seedlings have genotype Nn for gene LEAF-EDGE-110, which influences leaf edge. One grows under stressful conditions and shows weaker lobed leaves, while the other grows under normal conditions and shows stronger lobed leaves.

Which statement best explains genotype and phenotype in this case?

Aany change in appearance means the allele letters must have changed.

Bthe environment is an allele, so the condition should be written as part of the genotype.

Cphenotype means only the letters written for the allele pair.

Dthe genotype can stay the same while the phenotype can be affected by both genes and environment.

Solution & Explanation:Phenotype is the observed trait, and it can be influenced by genotype as well as environmental conditions.

Problem 2Difficulty: Mastery

A class record for a goldfish lists gene SCALE-PATTERN-109, alleles A and a, genotype aa, and phenotype plain scales.

Which revision would make the record scientifically clearer?

Areplace the genotype with a drawing of the visible trait.

Buse the same word for gene, allele, genotype, and phenotype because they mean the same thing.

Ckeep the gene name, allele symbols, genotype, and phenotype in separate labeled columns.

Ddelete the phenotype because only allele letters matter in genetics.

Solution & Explanation:Clear labels help students distinguish DNA information, versions of a gene, allele combinations, and visible traits.

Problem 3Difficulty: Mastery

Two genetically identical crickets have genotype Mm for gene BODY-COLOR-108, which influences body color. One grows under stressful conditions and shows weaker brown bodies, while the other grows under normal conditions and shows stronger brown bodies.

Which statement best explains genotype and phenotype in this case?

Aany change in appearance means the allele letters must have changed.

Bthe genotype can stay the same while the phenotype can be affected by both genes and environment.

Cthe environment is an allele, so the condition should be written as part of the genotype.

Dphenotype means only the letters written for the allele pair.

Solution & Explanation:Phenotype is the observed trait, and it can be influenced by genotype as well as environmental conditions.

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Frequently Asked Questions

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QWhat grade level and standards does this worksheet align with?

This worksheet is designed specifically for Grade 6 Science students. It aligns with educational standard SCI.6.93 (Grade 6 science practice and review on genes, alleles, genotype, and phenotype.).