Taylor Davenport - 8-7 Practice Blood Types | PDF | Dominance ... - Free Printable

Let’s go step by step to solve each part of the worksheet.

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1. Write the genotype for each person based on the description.

We know from the table:
- Type O = ii (or OO)
- Type A = IᴬIᴬ or Iᴬi
- Type B = IᴮIᴮ or Iᴮi
- Type AB = IᴬIᴮ

Also, remember:
- “Homozygous” means two same alleles.
- “Heterozygous” means two different alleles.
- If someone has a type “O” parent, that parent can only give an “i” allele.

Now let’s do each one:

a. Homozygous for the “B” allele
→ That means both alleles are B → IᴮIᴮ

b. Heterozygous for the “A” allele
→ One A and one other (must be i, since if it were B, it would be AB) → Iᴬi

c. Type O
→ Only possible genotype is ii

d. Type “A” and had a type “O” parent
→ Type O parent gives “i” allele. So the person must have gotten “i” from that parent. Since they’re type A, their other allele must be Iᴬ → Iᴬi

e. Type “AB”
→ Only possible genotype → IᴬIᴮ

f. Blood can be donated to anybody
→ From the table: Type O is universal donor → Genotype = ii

g. Can only get blood from a type “O” donor
→ From the table: Type AB can receive from anyone — wait, no! Let’s check again.

Wait — actually, looking at the table:

- Type O can ONLY receive from O → so if you can ONLY get blood from O, you must be Type O → genotype = ii

But hold on — let me double-check the table:

> Can receive blood from:
> - O → only O
> - AB → A,B,AB,O (universal receiver)
> - A → O,A
> - B → O,B

So who can ONLY receive from O? → Only Type O people.

So g → ii

Wait — but that’s same as f? No — f is about donating, g is about receiving.

Actually, re-read g: “Can only get blood from a type ‘O’ donor”

That means the ONLY blood type they can accept is O → which matches Type O recipients.

Yes → genotype = ii

But let’s make sure we didn’t mix up.

Actually — wait! There’s a mistake here.

Looking back at the table:

For Blood Type O: “Can receive blood from: O” → correct.

For Blood Type AB: “Can receive blood from: A,B,AB and O” → universal receiver.

So if someone can ONLY get blood from O → they must be Type O → genotype ii.

But then f and g both point to ii? That seems odd, but logically correct.

Wait — maybe I misread g.

g says: “Can only get blood from a type ‘O’ donor”

That means: when receiving blood, the ONLY compatible donor is type O.

Which blood types can ONLY receive from O? → Only Type O.

Because:
- Type A can receive from O and A
- Type B can receive from O and B
- Type AB can receive from all
- Type O can only receive from O

So yes → g → ii

But now f and g are both ii? That’s fine — different questions, same answer.

Alternatively — did I misread f?

f: “Blood can be donated to anybody” → Universal donor → Type O → ii

g: “Can only get blood from a type ‘O’ donor” → Must be Type O → ii

Okay, so both are ii. It’s correct.

But let’s write them clearly:

a. IᴮIᴮ
b. Iᴬi
c. ii
d. Iᴬi
e. IᴬIᴮ
f. ii
g. ii

Wait — but in the worksheet, f and g are listed under the Punnett square box — probably meant to be answered after, but still, we’ll list them.

Actually, looking at layout — f and g are separate lines below the first set, with blanks. So we treat them as part of question 1.

So final answers for #1:

a. IᴮIᴮ
b. Iᴬi
c. ii
d. Iᴬi
e. IᴬIᴮ
f. ii
g. ii

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2. Brad Pitt is homozygous for type B allele → genotype IᴮIᴮ
Angelina Jolie is type O → genotype ii

What are all possible blood types of their baby?

Do Punnett square:

Parent 1 (Brad): Iᴮ Iᴮ
Parent 2 (Angelina): i i

Each child gets one allele from each parent.

From Brad: always Iᴮ
From Angelina: always i

So all children will be: Iᴮi → which is Type B

Punnett Square:

| | i | i |
|-------|-------|-------|
| Iᴮ | Iᴮi | Iᴮi |
| Iᴮ | Iᴮi | Iᴮi |

All offspring: Iᴮi → Phenotype: Type B

So possible blood type: Only Type B

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3. Mother is type O → genotype ii
Father is type AB → genotype IᴬIᴮ

Complete Punnett square for offspring.

Mother’s gametes: i, i
Father’s gametes: Iᴬ, Iᴮ

Punnett Square:

| | Iᴬ | Iᴮ |
|-------|-------|-------|
| i | Iᴬi | Iᴮi |
| i | Iᴬi | Iᴮi |

Offspring genotypes:
- Iᴬi → Type A
- Iᴮi → Type B

Each appears twice → so 50% Type A, 50% Type B

Percentages:
- Type A: 50%
- Type B: 50%
- Type AB: 0%
- Type O: 0%

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Now, compiling all final answers.

Final Answer:

1.
a. IᴮIᴮ
b. Iᴬi
c. ii
d. Iᴬi
e. IᴬIᴮ
f. ii
g. ii

2. All possible blood types of their baby: Type B (genotype Iᴮi)
Punnett Square:
| | i | i |
|-------|-------|-------|
| Iᴮ | Iᴮi | Iᴮi |
| Iᴮ | Iᴮi | Iᴮi |

3. Punnett Square:
| | Iᴬ | Iᴮ |
|-------|-------|-------|
| i | Iᴬi | Iᴮi |
| i | Iᴬi | Iᴮi |

Percentages:
- Type A: 50%
- Type B: 50%
- Type AB: 0%
- Type O: 0%