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Worksheets

Pedigrees and Complex Inheritance

Total questions: 20

Worksheet time: 17mins

Name
Class
Date
1.

Which genotype do females have?

a)

XX

b)

XY

c)

AA

d)

Aa

2.

If hemophilia is an X-linked recessive disorder, what genotype would a carrier female have?

a)

XH XH

b)

XH Xh

c)

Xh Xh

3.

If hemophilia is an X-linked recessive disorder, what genotype would a normal male have?

a)

XH XH

b)

XH Y

c)

Xh Xh

d)

Xh Y

4.

If hemophilia is an X-linked recessive disorder, what genotype would a female with hemophilia have?

a)

XH XH

b)

XH Xh

c)

Xh Xh

d)

Xh Y

5.

If B symbolizes black fur and b symbolizes white fur, then what would the genotypes look like if parent 1 is homozygous recessive and parent 2 is heterozygous?

(parent 1 x parent 2)

a)

hh X Hh

b)

hh X HH

c)

Hh X Hh

d)

Black and white fur

6.

For the first trait, G = green hair and g = pink hair. For the second trait, Y = yellow eyes and y = white eyes.


After a dihybrid cross you find that 100% of the offspring have the genotype Ggyy.


What is their phenotype?

a)

Green hair and white eyes

b)

Pink hair and white eyes

c)

Green hair and yellow eyes

d)

Pink hair and yellow eyes

7.

If a red flower mixed with a white flower to create a pink flower we would call this...

a)

Complete Dominance

b)

Codominance

c)

Incomplete Dominance

d)

Multiple Alleles

8.

The AB blood type has both the A proteins from one allele and the B proteins from another. They do not blend. We call this...

a)

Incomplete Dominance

b)

Codominance

c)

Complete Dominance

d)

Recessive Dominance

9.

What type of inheritance pattern is shown here?

a)

Codominance

b)

Incomplete dominance

10.

What does this Punnett square and the probabilities of the ofspring represent?

a)

incomplete dominance

b)

codominance

11.

Some flowers are controlled by codominance. Red flowers (FRFR), blue flowers (FBFB) and Speckled flowers (FRFB).


Cross a red flower with a speckled flower. What is the phenotypic ratio?

a)

50% red, 50% speckled

b)

25% red, 25% blue

c)

100% blue

12.

A red flowered plant (RR) is crossed with a white flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have red (RR) flowers?

a)

0%

b)

25%

c)

50%

d)

100%

13.

If you have type O blood, what is your blood genotype?

a)

Ai

b)

Bi

c)

OO

d)

ii

14.
Which of the following genotypes belongs in the red box in the Punnett square?
a)
XBXB
b)
XbXb
c)
XbY
d)
XBY
15.

Codominance occurs in calico cats, which allows for the Black and Tan colors to show. What percentage of the offspring will be calico (black and tan spotted)?

a)

25

b)

50

c)

75

d)

100

16.

Incomplete dominance occurs in cats, which allows them to be Black, White, or gray as shown on this Punnett square. What percentage of the offspring will be black?

a)

25

b)

50

c)

75

d)

100

17.

How many individuals are there in the 3rd generation?

a)

1

b)

2

c)

4

d)

6

18.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
19.
What is the genotype of the father?
a)
AA
b)
aa
c)
Aa
d)
AA or aa
20.
What is the genotype of the mother?
a)
BB
b)
bb
c)
Bb
d)
BB or Bb