Separate variation and selection
Separate variation and selection using supplied evidence and a solved model.
About 25 minutes, plus any extended practice
Open lesson 1Variation, Selection and Common Ancestry
Explain population change through inherited variation and evidence.
Before you begin
- Read or listen to supplied scientific descriptions and follow a labeled diagram.
- Use signed quantities, ratios, exponents and the explicitly supplied model formulas.
Choose by skill rather than age alone. Read with an adult when useful, revisit a lesson, or explore another grade.
Follow the lesson sequence
Calculate a trait frequency
Calculate a trait frequency using supplied evidence and a solved model.
About 25 minutes, plus any extended practice
Open lesson 2Interpret ancestry evidence
Interpret ancestry evidence using supplied evidence and a solved model.
About 25 minutes, plus any extended practice
Open lesson 3Read a branching relationship model
Read a branching relationship model using supplied evidence and a solved model.
About 25 minutes, plus any extended practice
Open lesson 4Review and transfer
After the lessons, try 4 new review cases and a practical task. Each answer has an explanation and a link back to the related lesson.
Open the unit reviewGuest answers are temporary. Keep your own paper or document; this unit does not certify completion or record a school grade.
Topic references
- NGSS topic reference: topic reference — Variation, Selection and Common Ancestry; original supplementary instruction, not a certified alignment claim.
These references informed the topic selection. They do not certify complete standards alignment.