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Worksheets

Ch 12

Total questions: 25

Worksheet time: 19mins

Name
Class
Date
1.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
2.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
3.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
4.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both 
5.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
6.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
7.
B = brown eyes
b = blue eyes
What is true about these two brothers that have brown eyes?
One has genotype BB the other Bb.
a)
they have same phenotype and genotype
b)
they have different genotypes and phenotypes
c)
they have same phenotype but different genotypes
d)
they have same genotype but different phenotypes
8.
Which of the following is homozygous dominant?
a)
Yy
b)
Y
c)
yy
d)
YY
9.
Which of the following is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
10.

This type of inheritance pattern is a MIXTURE of two traits. This is known as ---

a)

incomplete dominance.

b)

codominance

11.

When one allele is not dominant over the other, resulting in both traits expressed in a heterozygous individual.....

a)

Incomplete Dominance

b)

Codominance

12.

A woman with curly hair and a man with straight hair produced a child with wavy hair:

a)

Incomplete dominance

b)

Codominance

c)

Complete dominance

13.

This is an example of ---

a)

Incomplete dominance

b)

Codominance

14.

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

a)

incomplete dominance

b)

codominance

15.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
16.

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%

17.

In mice coat color is incompletely dominant. Black and white are homozygous. Brown mice are heterozygous.


What is the genotype for a brown mouse?

a)

BB

b)

Bb

c)

bb

18.

Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).


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

a)

2 red, 2 speckled

b)

2 red, 2 blue

c)

2 blue, 2 speckled

19.

True or False? Before cells undergo meiosis they pass through interphase first.

a)

true

b)

false

20.

What is unique to Prophase I- is that the duplicated chromosomes pair up to form _______.

a)

a centrosome

b)

a tetrad

c)

the mitotic spindle

d)

sister chromatids

21.

In which stage of MEIOSIS does crossing over occur? (The exchange of genetic material between chromosomes in a tetrad.)

a)

Anaphase I

b)

Metaphase I

c)

Prophase I

d)

Telophase I

22.

How many cells are formed at the end of Meiosis II?

a)

2

b)

3

c)

4

d)

8

23.

Which part of MEIOSIS is identical to MITOSIS?

a)

Meiosis I

b)

Meiosis II

24.

The products of MEIOSIS have _______ number of chromosomes.

a)

haploid

b)

diploid

25.

WHAT DOES MEIOSIS CREATE?

a)

CHROMOSOMES

b)

GAMETES

c)

DNA

d)

TRAITS