Lesson 5: Inherited vs. Acquired Physical Traits
Inherited vs. Acquired Physical Traits
Learning Targets (Student-Friendly)
- I can tell the difference between inherited physical traits and acquired physical traits.
- I can sort real examples into “inherited,” “acquired,” or “both.”
- I can use class data to make a claim and support it with evidence.
Materials (common classroom items)
- Chart paper or whiteboard; markers
- Sticky notes or dot stickers (two colors)
- Student handouts (tables and exit ticket below)
- Optional: small mirrors, rulers
Key Vocabulary
- Inherited trait: a physical trait passed from parents to offspring through genes (eye color, natural hair texture).
- Acquired trait: a physical trait that appears because of the environment or life events (scar, suntan, pierced ears).
Common Misconceptions
- “All traits are inherited.” → Some traits are acquired from life experiences or the environment.
- “If most people in a class have a trait, it must be inherited.” → Popular styles (haircut) are acquired, not inherited.
- “One gene decides every trait.” → Many traits are influenced by more than one gene and by the environment.
5E Lesson Flow
Engage (5 minutes)
Bell Ringer — Milestones‑Style (Multiple Choice)
1) Which example shows an inherited physical trait?
- Jamal has brown eyes like his parents.
- Ava got her ears pierced last weekend.
- Diego scraped his knee playing soccer.
- Lina learned to do a handstand.
Students choose one answer on paper or by holding up fingers (A=1, B=2, etc.).
Demo (5 minutes)
Quick Demo: “Trait or Change?”
- On the board, draw a T‑chart: Inherited | Acquired.
- Teacher models three examples: earlobe type (inherited), haircut (acquired), freckles that darken in summer (both genes and sun).
- Students give a thumbs‑up for inherited, wave hand for acquired, and two hands for both.
Explore — Hands‑On Lab (20 minutes)
Lab: Class Trait Survey & Sort
Goal: Collect data about class traits and decide if each is inherited, acquired, or both.
Survey Traits (choose 6–8): eye color, natural hair texture (straight/wavy/curly), widow’s peak, attached vs. free earlobes, dimples, freckles, pierced ears, hair length today, braces, small scar (optional).
- Post a chart with three columns: Trait | Type | Count.
- For each trait, students place a colored dot on the poster if they have it (or raise hands for a tally).
- As a class, decide if the trait is mostly inherited, acquired, or both. Write the decision in the “Type” column.
- Record counts in the data table below. Then sketch a quick bar graph (one bar per trait).
| Trait | Type (Inherited / Acquired / Both) | Count in Our Class |
|---|---|---|
| Eye color (brown/blue/green/other) | ||
| Natural hair texture (straight/wavy/curly) | ||
| Widow’s peak | ||
| Earlobes (attached/free) | ||
| Dimples | ||
| Freckles | ||
| Pierced ears | ||
| Hair length today |
Bar Graph Sketch: Title your graph “Class Trait Counts.” Label x‑axis with trait names and y‑axis with number of students.
Lab Questions
- Which trait had the highest count? Is it inherited, acquired, or both?
- Pick one trait you marked as “both.” Explain how genes and environment could both affect it.
- Make a claim: “Most traits we surveyed were ________.” Use one piece of data to support your claim.
Explain (10 minutes)
Mini‑Lesson (Teacher Talk & Student Notes)
- Inherited traits come from parents through genes. They are present at birth or show up as you grow.
- Acquired traits come from life. They can be caused by the environment or choices (like a tan or a haircut).
- Some traits are influenced by both genes and environment (height, freckles, muscle size).
Quick‑Check — Milestones‑Style
- (Multiple Choice) Which is an acquired physical trait?
A. Eye color B. Widow’s peak C. Tattoo D. Earlobe type - (Select TWO) Which two are most likely inherited?
A. Natural hair texture B. Pierced ears C. Dimples D. Hair length today - (Two‑Part) Part A: Which statement is true?
A. All traits are inherited. B. All traits are acquired. C. Some traits are inherited and some are acquired. D. Traits do not change.
Part B: Which class data best supports your Part A answer?
A. Many students have different hair lengths. B. Everyone has the same eye color. C. No one has dimples. D. All students got braces this year. - (Multiple Choice) Which sentence is best? “A suntan is… ”
A. only inherited B. only acquired C. neither D. both inherited and acquired
Elaborate (5 minutes)
Sort the Scenario Cards (whole‑class quick sort)
- Card 1: “Sam has naturally curly hair.”
- Card 2: “Maya’s hair is short because she cut it.”
- Card 3: “Jalen grew taller after eating healthier foods.”
- Card 4: “Tia has a small scar on her knee.”
Place each card under Inherited, Acquired, or Both and justify with one sentence.
Evaluate (Exit Ticket — 5 minutes)
- (Multiple Choice) Which trait is most likely inherited?
A. Hair dyed blue B. Eye color C. Tattoo D. Short hair - (Multiple Choice) Which is an acquired physical trait?
A. Earlobe type B. Dimples C. Pierced ears D. Natural hair texture - (Multiple Choice) Which could be influenced by both genes and environment?
A. Height B. Birth month C. Number of fingers D. Blood type - (Two‑Part) Part A: Which group title fits “scar, braces, haircut”?
A. Inherited traits B. Acquired traits C. Learned behaviors D. Both inherited and acquired
Part B: Which sentence explains your choice?
A. “They come from parents only.”
B. “They result from choices or life events.”
C. “They are all behaviors.”
D. “They never change.” - (Short Answer) Write one inherited physical trait and one acquired physical trait. Explain in one sentence why each fits the group.
Standards Alignment
Georgia Standards of Excellence — S5L2.b: Give examples of inherited traits and learned behaviors in animals (this lesson focuses on distinguishing inherited vs. acquired physical traits and recognizing that some traits are influenced by both genes and environment).
Answer Keys
Bell Ringer
1) A
Quick‑Check
- C (Tattoo is acquired.)
- A and C (Natural hair texture; Dimples are commonly inherited.)
- Part A: C (Some traits are inherited and some are acquired.)
Part B: A (Different hair lengths show an acquired trait; supports Part A by contrast with inherited ones.) - B (A suntan is acquired from sun exposure.)
Exit Ticket
- B (Eye color)
- C (Pierced ears)
- A (Height can be influenced by genes and nutrition.)
- Part A: B (Acquired traits); Part B: B
- Sample: “Inherited = widow’s peak (comes from parents). Acquired = scar (caused by an event).”