Back to Details Grade 7 Quick Quiz: Heredity and Traits Review Open in Editor

Grade 7 Quick Quiz: Heredity and Traits Review

📚 Science 🎓 Grade 7

Learning Objectives

  • Explain why sexual reproduction usually creates more genetic variation than asexual reproduction.

  • Distinguish inherited traits from acquired or environmental traits using clear examples.

  • Use a 2x2 Punnett square to determine the probability of a recessive trait appearing in offspring when both parents are carriers.

  • Describe why inbreeding can increase the risk of genetic disorders over generations.

  • Identify how DNA is packaged to fit inside a cell nucleus.

Progress 6 sections
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Instructions

Use the diagrams and notes below as needed. Answer each question by choosing the best option.

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Question 1

Asexual vs Sexual Reproduction (Genetic Variation)
Two-panel diagram. Left panel: one parent produces two identical offspring labeled clones. Right panel: two parents contribute DNA to one offspring labeled mixed DNA, showing greater variation....
Question 1

Which statement best explains why sexual reproduction usually creates more genetic variation than asexual reproduction? (See Diagram C-002 if helpful.)

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Question 2

Inherited vs Acquired Traits (Examples)
A two-column chart. Left column labeled Inherited with examples blood type and natural eye color. Right column labeled Acquired or Environmental with examples scar and learning a skill....
Question 2

Classify each trait as either Inherited (mostly genetic, present from birth) or Acquired/Environmental (developed from environment, choices, or life events). (See Diagram C-006 if helpful.)

Traits: 1) Blood type 2) Scar from a cut 3) Natural eye color 4) Ability to play the piano

Which option correctly classifies ALL four?

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Question 3

Punnett Square for Bb x Bb
A 2 by 2 Punnett square showing the cross Bb by Bb with boxes BB, Bb, Bb, and bb. The bb box is highlighted as recessive....
Question 3

Two parents both show the dominant trait, but both are carriers for the recessive allele. Their genotypes are Bb and Bb.

Use the Punnett square (Diagram C-003). What is the percent chance that an offspring will show the recessive trait?

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Question 4

Why Inbreeding Can Increase Genetic Disorders
A simple diagram showing two related parents who both carry the same harmful recessive allele, increasing the chance of a child inheriting two recessive copies and expressing a disorder....
Question 4

In a sexually reproducing species, why can inbreeding increase the risk of genetic disorders over multiple generations? (See Diagram C-004 if helpful.)

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Question 5

How Long DNA Fits in a Tiny Nucleus
Diagram showing a long DNA strand labeled about 2 meters being tightly wrapped around protein spools and folded to fit inside a small circle labeled nucleus....
Question 5

In a human cell, DNA is extremely long. If you stretched out the DNA from one cell, it would be about 2 meters (around 6 feet) long, yet it fits inside a nucleus that is only a few micrometers wide.

Which statement best explains how this is possible? (See Diagram C-005 if helpful.)