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12.7_6thSci_TR 4.2

Last updated almost 3 years ago
15 questions
Objective and Slides
KWBAT use a punnett square to model the inheritance of a gene and predict the gene versions of offspring.
Part 1

Part 1: Do Now

1

Predict:
Which gene combination(s) will result in Sticky Silk?

1

Predict:
Which gene combination(s) will result in NOT Sticky Silk?

0

Could the offspring have a trait that neither parent has? Explain.

CFS:
*Passing of genes, random or selected?
*How are gene combinations determined?
*Gene combinations always the same?

Sentence Starter:
I (think/do not think) the offspring could have a trait that neither parent has because...

Part 2

Part 2: Punnett Squares

1

What is a genotype?

1

What is a phenotype?

1

Check Your Understanding: Which of the following is NOT something that a Punnett Square can tell us?

Part 3

Part 3: Practicing Punnett Squares

1

What are the possible offspring genotypes for this Punnett Square?

The table below shows different gene versions for pea plants. Remember: dominant gene versions are shown with a CAPITAL letter.

1

One tall (TT) and one short (tt) pea plant reproduce.

Complete the Punnett Square for these plants.

CFS:
*Mom and Dad Genotypes.
*One allele passed down to each.
*Dominant vs recessive?

(Color coding each parents genotype makes it easier to do!)

1

How many offspring will be tall? (Have the dominant allele)

1

One plant with white flowers (pp) and another with white flowers (pp) reproduce.
Hint: both are recessive!

Complete the Punnett Square for these plants.

CFS:
*Mom and Dad Genotypes.
*One allele passed down to each.
*Dominant vs recessive?

(Color coding each parents genotype makes it easier to do!)

1

How many offspring will be purple?

1

One plant with wrinkled peas (ss) and another with smooth peas (Ss) reproduce.

CFS:
*Mom and Dad Genotypes.
*One allele passed down to each.
*Dominant vs recessive?

Complete the Punnett Square for these plants.

(Color coding each parents genotype makes it easier to do!)

1

How many offspring will be smooth?

Part 4

PART 4: Exit Ticket

In humans, there is a gene that can cause a very rare disease called Tay-Sachs. One version of the gene (T) is healthy, while the other (t) is unhealthy. Doctors have figured out the following pattern:


1

Two parents are healthy and have the gene versions Tt and Tt.

CFS:
*Mom and Dad Genotypes.
*One allele passed down to each.
*Dominant vs recessive?

Complete the Punnett Square for these parents

1

How many of their children will have the disease?
Which offspring(s) will have the disease?

CFS:
*Did I look at the table?
*Did I see what trait results in the disease?

Finished Early?
Finished early?
  1. Please note that I will start marking your assignments as MISSING if you FORGET TO SUBMIT.
  2. You SHOULD NOT be playing any of these if you did not submit. Your computer will be locked.
  3. Review the TR EOU Slides to prepare for tomorrow. Review any previous formatives.
  4. Preview the Pokemon Project that we will begin on Friday.
  5. Finish the Science Packet (due Friday).
Done with all that? Try these:
  • Legends of Learning Game Set 1
  • Legends of Learning Game Set 2
  • Blooket Set 1
  • Blooket Set 2
  • Dragons Genetics Game