Free Printable WorksheetScienceGrade 7Science CurriculumMS-LS3-2

7.50 Reading Pedigree Charts Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Grade 7 Science worksheet provides structured practice on 7.50 Reading Pedigree Charts. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Reading Pedigree Charts - Which pedigree best fits a recessive inheritance pattern for the described trait? (NGSS MS‑LS3‑2 connections)

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 7

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 7.50 Reading Pedigree Charts skill assessments:

Problem 1Difficulty: Mastery
The image shows four candidate pedigrees labeled A through D. A scientist wants the pedigree that best matches a simple recessive trait affecting boys and girls equally, including an affected child born to two unaffected parents. Which pedigree should the scientist choose?
AChart D
BChart B
CChart C
DChart A
Solution & Explanation:Pedigree C matches the key clues for simple recessive inheritance because it shows both sexes affected and includes an affected child with two unaffected parents.
Problem 2Difficulty: Mastery
A teacher shows a pedigree with one affected child, two unaffected parents, and all unaffected grandparents. Which claim is most justified?
AEvery grandparent must be affected but not shaded
BThe trait cannot be genetic
CThe trait must have started only in the affected child
DThe recessive allele was likely carried silently through earlier generations
Solution & Explanation:Unaffected relatives can still carry a recessive allele and pass it along until a child inherits two copies.
Problem 3Difficulty: Mastery
Which combination of clues gives the strongest support for autosomal recessive inheritance in a pedigree?
AThe trait appears in every generation and only one sex is affected
BUnaffected parents have an affected child, and both sexes are affected in the family
COnly firstborn children are affected
DEvery affected person has an affected parent, and the trait never skips a generation
Solution & Explanation:Affected children from unaffected parents are a strong clue for recessive inheritance, and involvement of both sexes fits an autosomal pattern.

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Frequently Asked Questions

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QIs this 7.50 Reading Pedigree Charts worksheet free for teachers and homeschoolers?

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QCan students practice 7.50 Reading Pedigree Charts online with instant feedback?

Yes! In addition to this printable worksheet, students can practice 7.50 Reading Pedigree Charts interactively on our platform with automated grading, instant score tracking, and detailed step-by-step solutions.

QWhat grade level and standards does this worksheet align with?

This worksheet is designed specifically for Grade 7 Science students. It aligns with educational standard MS-LS3-2 (Primary standard selected for prompt fields in this prompt cell: NGSS MS-LS3-2. Skill statement in this prompt cell: Which pedigree best fits a recessive inheritance pattern for the described trait? Associated standards listed with this skill in this prompt cell: NGSS MS-LS3-2 connections. Use this prompt-provided wording as the supporting standard description for this workflow.).

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