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6.95 Mutations and Genetic Variation Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Grade 6 Science worksheet provides structured practice on 6.95 Mutations and Genetic Variation. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Mutations and Genetic Variation - Which statement best describes mutations and genetic variation? (NGSS MS‑LS3‑1/2)

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 6.95 Mutations and Genetic Variation skill assessments:

Problem 1Difficulty: Mastery

After a storm, a two snail populations population showed differences in shell thickness. Rafted seaweed carried snails to a new beach where they reproduced. For these two snail populations, which statement best describes the effect of migration on variation?

Agene flow is the same as mutation because it changes DNA bases directly.

Bgene flow removes all variation because everyone becomes identical immediately.

Cgene flow happens only when organisms evolve into a new species overnight.

Dgene flow can introduce new alleles into a population, increasing variation and changing allele frequencies.

Solution & Explanation:Gene flow adds or removes alleles when individuals move between populations and reproduce, which can change allele frequencies and increase variation in the receiving population.

Problem 2Difficulty: Mastery

Across a newly built bridge, a two bird populations population showed differences in beak shape. Birds started nesting on both sides and interbreeding. Which statement best explains how moving individuals can change allele frequencies in the two bird populations example?

Agene flow happens only when organisms evolve into a new species overnight.

Bgene flow can introduce new alleles into a population, increasing variation and changing allele frequencies.

Cgene flow is the same as mutation because it changes DNA bases directly.

Dgene flow removes all variation because everyone becomes identical immediately.

Problem 3Difficulty: Mastery

Between connected lakes, a two fish populations population showed differences in body color. A new stream connected the lakes and fish began moving between them. In the two fish populations situation, which statement best describes how gene flow affects genetic variation?

Agene flow removes all variation because everyone becomes identical immediately.

Bgene flow happens only when organisms evolve into a new species overnight.

Cgene flow is the same as mutation because it changes DNA bases directly.

Dgene flow can introduce new alleles into a population, increasing variation and changing allele frequencies.

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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.6.95 (Grade 6 science practice and review on mutations and genetic variation.).