Free Printable WorksheetScienceGrade 8Science CurriculumSCI.8.87

8.87 Genes, Chromosomes and DNA Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Grade 8 Science worksheet provides structured practice on 8.87 Genes, Chromosomes and DNA. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Genes, Chromosomes and DNA - Which description best how genetic information is stored and organized in chromosomes and how genes code for proteins that influence traits (conceptual)? (NGSS MS‑LS3‑1; DCI LS3.A/B; 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

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 8.87 Genes, Chromosomes and DNA skill assessments:

Problem 1Difficulty: Mastery

A scientist studies a gene on Chromosome 7 and finds that it is often co-inherited with a nearby DNA marker. "

What is the best reason this marker is useful?,A. It increases mutation rates so traits appear faster. | B. It guarantees that everyone has the same allele. | C. It helps track the gene’s location because nearby regions are less likely to be separated by crossing over. | D. It changes the gene into a protein directly.,C,Markers close to a gene tend to stay linked due to low recombination between them. This allows tracking of inheritance patterns and mapping the gene’s position.,YES,labeled-diagram,Create a clean Grade 8 genetics diagram based on the row context. Show DNA

Solution & Explanation:or cell structures with clear labels and answer-neutral presentation. Use this question context: Passage: A scientist studies a gene on Chromosome 7 and finds that it is often co-inherited with a nearby DNA marker. Question: What is the best reason this marker is useful? If helpful

Problem 2Difficulty: Mastery

A gene is expressed in bacteria. The gene is placed under a strong bacterial promoter and produces lots of protein. What does this best show about organization vs coding?

AChromosome number determines protein sequence, while promoters determine base pairing.

BThe gene’s coding sequence determines the protein, while promoters/regulators determine how much is made.

COnly eukaryotes can translate proteins correctly.

DPromoters determine amino acid meanings, while coding sequence determines chromosome number.

Solution & Explanation:The coding region specifies amino acid sequence; regulatory elements like promoters control transcription level. Changing regulation can change quantity without changing the protein sequence.

Problem 3Difficulty: Mastery

A mutation changes a codon from UGG (Trp) to UGA (stop).

Compared with a missense mutation," why is this often more harmful?,A. It only changes one amino acid

Solution & Explanation:often truncating the protein and removing essential domains

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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.8.87 (Connect DNA, genes, and chromosomes to heredity and cell structure.).