Educational Punnett square worksheet for genetics practice, featuring examples and exercises on eye color, hair type, and plant characteristics.

Let’s solve each “Your Turn Now!” problem one by one. We’ll use the Punnett square method shown in the examples.

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Problem 1: Eye Color (Father BB, Mother bb)

- Father has dominant brown eyes → genotype BB
- Mother has recessive blue eyes → genotype bb

We put father’s alleles on top: B and B
We put mother’s alleles on the side: b and b

Now fill in the squares:

Top row: B + b = Bb, B + b = Bb
Bottom row: B + b = Bb, B + b = Bb

All four boxes are Bb

→ So all children will have genotype Bb → which means they will have brown eyes (since B is dominant).

✔ Final answer for this part: All offspring will be Bb → brown eyes.

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Problem 2: Hair Type (Father Cc, Mother cc)

- Father has curly hair → genotype Cc (hybrid)
- Mother has straight hair → genotype cc (recessive)

Put father’s alleles on top: C and c
Put mother’s alleles on the side: c and c

Fill in the squares:

Top left: C + c = Cc
Top right: c + c = cc
Bottom left: C + c = Cc
Bottom right: c + c = cc

So we get:
- Two Cc (curly hair)
- Two cc (straight hair)

That’s a 50% chance of curly hair, 50% straight hair.

✔ Final answer for this part: Offspring genotypes are Cc, cc, Cc, cc → so half curly, half straight.

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Problem 3: Flower Petal Color (Red RR x Yellow Rr)

Wait — let’s read carefully:

> The red petal is dominant (RR)
> The yellow petal flower is a hybrid (Rr)

But hold on — if red is dominant, then RR and Rr should both be red. Why is one called “yellow”? That seems contradictory.

Actually, looking again — it says:

> “The red petal is dominant (RR)” → meaning pure red
> “The yellow petal flower is a hybrid (Rr)” → but if R is dominant for red, then Rr should also be red, not yellow.

This might be a trick or typo? But let’s assume the problem means:

- Red is dominant → allele R
- Yellow is recessive → allele r

Then:

- Red flower = RR (homozygous dominant)
- Yellow flower = must be rr to show yellow (recessive trait)

But the problem says “yellow petal flower is a hybrid (Rr)” — that doesn’t make sense biologically, because if R is dominant for red, then Rr would be red, not yellow.

Hmm… maybe there’s a mistake in the problem? Or perhaps “hybrid” here just means heterozygous, and they’re calling it yellow incorrectly?

Wait — let’s re-read:

> “Two flowers are crossed together.
> The red petal is dominant (RR)
> The yellow petal flower is a hybrid (Rr)”

If we take it literally, even though it’s biologically odd, we’ll go with:

Parent 1: RR (red)
Parent 2: Rr (called “yellow”, but genetically Rr)

So cross: RR × Rr

Put RR on top: R, R
Put Rr on side: R, r

Squares:

Top left: R + R = RR
Top right: R + R = RR
Bottom left: R + r = Rr
Bottom right: R + r = Rr

So offspring:
- Two RR
- Two Rr

All have at least one R → so all should be red petals (if R is dominant).

But the problem calls Rr “yellow” — which contradicts dominance. Maybe it’s a test to see if you follow the genetics rules regardless of labeling?

In standard genetics, if R is dominant for red, then Rr = red.

So I think the label “yellow” for Rr is misleading or wrong. We’ll go by the alleles.

✔ Final answer for this part: Offspring genotypes are RR, RR, Rr, Rr → all red petals.

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Problem 4: Seed Pod Texture (Smooth SS x Wrinkled ss)

- Smooth seed pod = dominant → SS
- Wrinkled seed pod = recessive → ss

Cross: SS × ss

Put SS on top: S, S
Put ss on side: s, s

Squares:

Top left: S + s = Ss
Top right: S + s = Ss
Bottom left: S + s = Ss
Bottom right: S + s = Ss

All offspring are Ss → since S is dominant, all will have smooth seed pods.

✔ Final answer for this part: All offspring are Ss → smooth seed pods.

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Now, compiling final answers for each “Your Turn Now!” section:

1. Eye color: All children are Bb → brown eyes
2. Hair type: Children are Cc, cc, Cc, cc → 50% curly, 50% straight
3. Flower petals: Offspring are RR, RR, Rr, Rr → all red (assuming R dominant)
4. Seed pods: All offspring are Ss → smooth

Since the worksheet asks to “find the possible eye color”, “hair feature”, etc., we report the genotypes and phenotypes as appropriate.

Final Answer:

For eye color: All offspring have genotype Bb → brown eyes.
For hair type: Offspring genotypes are Cc, cc, Cc, cc → 50% curly hair, 50% straight hair.
For flower petals: Offspring genotypes are RR, RR, Rr, Rr → all red petals.
For seed pods: All offspring have genotype Ss → smooth seed pods.