Free Printable WorksheetScienceGrade 8Science CurriculumSCI.8.88

8.88 Asexual and Sexual Reproduction and Variation Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Grade 8 Science worksheet provides structured practice on 8.88 Asexual and Sexual Reproduction and Variation. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Asexual and Sexual Reproduction and Variation - Which option best contrast asexual and sexual reproduction and explain qualitatively how each affects genetic variation in populations? (NGSS MS‑LS3‑2; TEKS §112.28 Grade 8; FL NGSSS; VA SOL; MA STE)

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 8

Subject

Science

Domain

Science Curriculum

Formats

PDF & DOCX

Sample Practice Problems

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Below are sample questions representative of the exercises included on this worksheet and related 8.88 Asexual and Sexual Reproduction and Variation skill assessments:

Problem 1Difficulty: Mastery

Which explanation best fits both clues?

AThe population must reproduce asexually because identical DNA stretches can only occur in clones.

BThe population must have high variation because sexual reproduction automatically prevents inbreeding.

CThe population’s DNA stretches prove that genes do not affect traits, so variation is irrelevant.

DThe population reproduces sexually, but a recent bottleneck or strong inbreeding reduced variation, making many individuals share large identical DNA segments despite sexual reproduction.

Solution & Explanation:Choice D is correct because sexual reproduction can still yield low variation if few individuals contribute genes (bottleneck/inbreeding), leading to shared DNA regions across the population.

Problem 2Difficulty: Mastery

Which option best corrects the student using a specific genetic scenario?,A. Any two-parent reproduction creates infinite variation instantly

Aso the student is always correct.

BAsexual reproduction always deletes mutations

Solution & Explanation:sexual offspring may not be very varied

Problem 3Difficulty: Mastery

Which option best explains how resistance increased even though variation stayed low?

AResistance increased because asexual reproduction created many different resistant genotypes each generation.

BA rare mutation (or rare resistant individual) allowed survival, and asexual reproduction quickly copied that resistant genotype; however, cloning spread one genotype, keeping overall variation low.

CResistance increased because pesticides directly taught insects to resist and then they passed the lesson on genetically.

DResistance could not increase in asexual reproduction because selection requires sexual reproduction.

Solution & Explanation:Choice B is correct because natural selection can favor a rare resistant variant, and cloning can rapidly amplify it, even while reducing diversity because one genotype dominates.

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QWhat grade level and standards does this worksheet align with?

This worksheet is designed specifically for Grade 8 Science students. It aligns with educational standard SCI.8.88 (Compare asexual and sexual reproduction and how each affects variation.).