Free Printable Genetics - Dominant Recessive Review

1.

The trait that will always be expressed if one copy of an allele is present.

a)

recessive

b)

dominant

c)

co-dominant

2.

The trait that will be expressed only if two copies of the allele are present.

a)

recessive

b)

dominant

c)

co-dominant

3.

The information that is passed from parent to offspring:

a)

cell

b)

gene

c)

trait

d)

nucleus

4.

Genes come in pairs because if one doesn't work, we have a spare.

a)

True

b)

False

5.

Genes come in pairs because we get one copy from mom and one copy from dad.

a)

True

b)

False

6.

Genes come in different forms.

a)

True

b)

False

7.

A man has attached earlobes (ee). What would the sperm cells look like?

a)

Each sperm cell has 2 copies (ee) (ee)

b)

Each sperm cell has 1 copy (e) (e)

c)

One sperm cell has the genes and one does not (ee) ( )

d)

Each sperm cell has 1 copy (E) (e)

8.

A woman has unattached earlobes (EE). What would the egg cells look like?

a)

Each egg cell has 2 copies (EE) (EE)

b)

Each egg cell has 1 copy (E) (e)

c)

One egg cell has the genes and one does not (EE ) ( )

d)

Each egg cell has 1 copy (E) (E)

9.

Being able to roll the tongue is a dominant trait (T). Not being able to roll the tongue is a recessive trait (t). A persons genes are tt. Which trait would they have?

a)

Able to roll the tongue

b)

Not able to roll the tongue

c)

Can't tell

10.

Being able to roll the tongue is a dominant trait (T). Not being able to roll the tongue is a recessive trait (t). A persons genes are Tt. Which trait would they have?

a)

Able to roll the tongue

b)

Not able to roll the tongue

c)

Can't tell

11.

Being able to roll the tongue is a dominant trait (T). Not being able to roll the tongue is a recessive trait (t). A persons genes are TT. Which trait would they have?

a)

Able to roll the tongue

b)

Not able to roll the tongue

c)

Can't tell

12.

Black hair (H) is a dominant gene in guinea pigs and black yellow (h) is recessive. What color hair would a guinea pig have if it got a recessive gene (h) from mom and a dominant gene (H) from dad?

a)

Black hair

b)

Yellow hair

c)

Can't tell

13.

Black hair (H) is a dominant gene in guinea pigs and black yellow (h) is recessive. What color hair would a guinea pig have if it got a recessive gene (h) from mom and a recessive gene (h) from dad?

a)

Black hair

b)

Yellow hair

c)

Can't tell

14.

Black hair (H) is a dominant gene in guinea pigs and black yellow (h) is recessive. What color hair would a guinea pig have if it got a dominant gene (H) from mom and a dominant gene (H) from dad?

a)

Black hair

b)

Yellow hair

c)

Can't tell

15.

Black noses are dominant (B) and pink noses are recessive (b) in dogs. A dog has a pink nose. What would the dogs genes be?

a)

BB

b)

Bb

c)

bb

d)

They have one B for sure but can't tell the other gene for sure

e)

You can't tell genes just by knowing a trait

16.

Black noses are dominant (B) and pink noses are recessive (b) in dogs. A dog has a black nose. What would the dogs genes be?

a)

BB

b)

Bb

c)

bb

d)

They have one B for sure but can't tell the other gene for sure

e)

You can't tell genes just by knowing a trait

17.

A child has blue eyes, but both of her parents have brown eyes. What are the genes for each person?

a)

She's adopted; a child can't have a different trait from their parent

b)

Child = BB; Mom = BB; Dad = BB

c)

Child = bb; Mom = BB; Dad = Bb

d)

Child = bb; Mom = Bb; Dad = Bb

e)

Child = BB; Mom = Bb; Dad = Bb

18.

One parent has the genes Gg and the other parent has GG. What are the possible genes of their children?

a)

Gg, GG, gG, and gg

b)

All GG

c)

All Gg

d)

All gg

e)

Half GG, Half Gg

19.

Both parents have the genes Gg. What are the possible genes of their children?

a)

Gg, GG, gG, and gg

b)

All GG

c)

All Gg

d)

All gg

e)

Half GG, Half Gg

20.

One parent has the genes GG and the other parent has gg. What are the possible genes of their children?

a)

Gg, GG, gG, and gg

b)

All GG

c)

All Gg

d)

All gg

e)

Half GG, Half Gg

21.

In llamas, a long neck (L) is dominant and a short neck is recessive (l). If a long neck llama (LL) has a baby llama with a short neck llama (ll), what are the chances the baby llama will have a short neck?

a)

0/4

b)

1/4

c)

2/4

d)

3/4

e)

4/4

22.

In llamas, a long neck (L) is dominant and a short neck is recessive (l). If a long neck llama (Ll) has a baby llama with a short neck llama (ll), what are the chances the baby llama will have a long neck?

a)

0/4

b)

1/4

c)

2/4

d)

3/4

e)

4/4

23.

In llamas, a long neck (L) is dominant and a short neck is recessive (l). If 2 long neck llamas (Ll) have a baby llama, what are the chances the baby llama will have a long neck?

a)

0/4

b)

1/4

c)

2/4

d)

3/4

e)

4/4

24.

In llamas, a long neck (L) is dominant and a short neck is recessive (l). If 2 long neck llamas (Ll) have a baby llama, what are the chances the baby llama will have a short neck?

a)

0/4

b)

1/4

c)

2/4

d)

3/4

e)

4/4

25.

In llamas, a long neck (L) is dominant and a short neck is recessive (l). If a long neck llama (LL) has a baby llama with a short neck llama (ll), what are the chances the baby llama will have a long neck?

a)

0/4

b)

1/4

c)

2/4

d)

3/4

e)

4/4

26.

In llamas, a long neck (L) is dominant and a short neck is recessive (l). If a long neck llama (Ll) has a baby llama with a short neck llama (ll), what are the chances the baby llama will have a short neck?

a)

0/4

b)

1/4

c)

2/4

d)

3/4

e)

4/4

Genetics - Dominant Recessive Review

Total questions: 26

Worksheet time: 16mins

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