Biology: Genetics and Punnett Squares

Today's focus is genetics and punnett squares. Read for the underlying mechanism, not just the vocabulary. Ask, 'Why does this happen?' If you can explain the cause, you understand the topic. Connect to current events if possible.

• pencil
• paper

Name something you don't understand about the world. Today might bring you one step closer.

1. 1

   Read these facts: A Punnett square predicts offspring genotype probabilities. With Rr × Rr, possible outcomes are RR, Rr, Rr, rr — a 25% chance of homozygous recessive. Q: What is a Punnett square?

   Parent tip: Read aloud first. Re-read if the question is hard.
2. 2

   List outcomes of Rr × Rr.

   Parent tip: Encourage answers in complete sentences.

1. 1

   Probability of recessive trait?
2. 2

   Which is dominant: R or r?
3. 3

   Define heterozygous.
4. 4

   Where might you see this idea in real life?
5. 5

   Connect this topic to something you've seen before.
6. 6

   Write one new thing you learned today.
7. 7

   Draw a picture of one idea from the passage and label it.
8. 8

   Ask one question you still have about this topic.
9. 9

   Where might you see this idea in real life?
10. 10

    Connect this topic to something you've seen before.

What is one question this lesson left you wondering about?