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Amoeba Sisters Pedigree - Printable Science Worksheets 10th Grade - Wayground

Amoeba Sisters Pedigree

Shannon Presloid

Created by Shannon Presloid

1 questions

10th Grade

Science

Updated Apr 2026

Amoeba Sisters Pedigree is a Grade 10 biology worksheet that builds foundational skills for interpreting pedigrees and applying inheritance rules. Students complete one comprehension-video prompt and 10 multiple-choice questions about pedigree symbols, shaded and half-shaded shapes, generations, autosomes, autosomal recessive genotypes, and sex-linked recessive traits. The questions connect visual pedigree conventions to genotype reasoning, including identifying possible genotypes for an unshaded parent and recognizing the genotype required for a female to express a sex-linked recessive trait. This free printable worksheet helps students review how pedigrees track the inheritance of traits and distinguish autosomal from sex-linked patterns. It works well after instruction or a video lesson as guided practice, independent review, or a quick formative assessment of genetics vocabulary and interpretation skills. The worksheet includes a complete answer key so teachers can check students’ understanding of pedigree symbols, chromosome categories, and genotype-based conclusions efficiently.

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Amoeba Sisters Pedigree

Total questions: 1

Name
Class
Date

1-10.

Answer the questions below after watching the video

1.

What shape is used to represent females in a pedigree?

a)

Triangles

b)

Squares

c)

Hexagons

d)

Circles

2.

How many generations are depicted in the discussed pedigree?

a)

Three

b)

One

c)

Four

d)

Two

3.

What does a shaded shape in a pedigree represent?

a)

A non-carrier of a trait

b)

A carrier of a trait

c)

A recessive trait being tracked

d)

A dominant trait

4.

What is the genotype of an individual with attached earlobes, considering it's an autosomal recessive trait?

a)

EE

b)

Ee

c)

ee

d)

Ee or EE

5.

Which chromosomes are considered autosomes?

a)

Only the Y chromosome

b)

Only the X chromosome

c)

The last 2 pairs

d)

The first 22 pairs

6.

If a father has free earlobes and is not shaded in the pedigree, what could be his genotype?

a)

ee

b)

Ee

c)

EE

d)

Cannot be determined

7.

For a sex-linked recessive trait, what genotype must a female have to express the trait?

a)

XRXR

b)

XRXr

c)

XRY

d)

XrXr

8.

How are males represented in a sex-linked pedigree?

a)

XrY

b)

YY

c)

XY

d)

XX

9.

What does it mean if a pedigree shape is half-shaded?

a)

The individual is a carrier of a recessive trait.

b)

The individual has a sex-linked trait.

c)

The individual expresses a recessive trait.

d)

The individual is a carrier of a dominant trait.

10.

What is the significance of understanding pedigrees in genetics?

a)

To understand genetic mutations

b)

To create new genetic traits

c)

To predict future traits

d)

To track the inheritance of traits

WaygroundAnswer Key

Amoeba Sisters Pedigree

Total questions: 1

1-10.
1.
d)

Circles

2.
d)

Two

3.
c)

A recessive trait being tracked

4.
c)

ee

5.
d)

The first 22 pairs

6.
b)

Ee

7.
d)

XrXr

8.
c)

XY

9.
a)

The individual is a carrier of a recessive trait.

10.
d)

To track the inheritance of traits

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FAQs

What does the Amoeba Sisters Pedigree worksheet cover, and how does it help students interpret genetic pedigrees?

This Grade 10 biology worksheet uses one comprehension-video prompt and 10 multiple-choice questions to practise reading pedigree symbols and applying inheritance rules. Students identify circles and squares, interpret shaded and half-shaded shapes, count generations, determine autosomal recessive genotypes, and distinguish autosomal patterns from sex-linked recessive traits.

How can I use this pedigree worksheet to teach autosomal and sex-linked inheritance?

Use the video-comprehension prompt to introduce the pedigree being discussed, then have students annotate what each symbol, shading pattern, and generation represents before answering the multiple-choice questions. Review the earlobe items and sex-linked genotype items together, asking students to explain why an autosomal recessive individual must have two recessive alleles and why a female must inherit two recessive X-linked alleles to express the trait.

What mistakes should I watch for when students complete this pedigree worksheet?

Students may confuse the symbols for males and females, treat any shaded shape as a carrier, or overlook that half-shading identifies a carrier of a recessive trait. Watch also for errors in separating the first 22 chromosome pairs from sex chromosomes and in applying sex-linked notation, especially choosing a heterozygous female genotype when the question asks which genotype expresses a recessive trait.

How do I assign and grade the Amoeba Sisters Pedigree worksheet?

The worksheet is available as a printable PDF and as a digital quiz on Wayground, and it includes a complete answer key for the video-comprehension prompt and multiple-choice questions. For printable submissions, scan student work with the Wayground for Teachers app to help grade responses efficiently.

How can I differentiate this pedigree worksheet for my students?

Create an alternate version under the worksheet’s Advanced Settings by adjusting font spacing or choosing a larger font size so the pedigree vocabulary and multiple-choice options are easier to read. You can also enable a dyslexia-friendly font or translate the worksheet into another language while keeping the questions about symbols, genotypes, and inheritance patterns.

Where can I find more worksheets like this on Wayground?

Wayground offers a comprehensive collection of free printable worksheets and practice problems across subjects, with downloadable PDFs and answer keys to support essential skills and concepts. Browse more resources at https://wayground.com/en-us/worksheets.

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