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Biology

Total questions: 29

Worksheet time: 16mins

Name
Class
Date
1.

When does crossing over occur?

a)

Anaphase of mitosis

b)

Prophase 1 of meoisis

c)

Prophase of mitosis

d)

Anaphase 2 of meiosis

2.

Based on the karyotype below, this patient would be a

a)

male with Trisomy 21

b)

female with Trisomy 21

c)

normal female

d)

normal male

3.

Homologous chromosomes are two chromosomes with identical DNA sequences.

a)

True

b)

False

4.

A transgenic organism is best described as 

a)

An unmodified bacterial cell

b)

An organism that contains foreign DNA

c)

A clone

d)

A gel electrophoresis

5.

Cloning produces organism that are

a)

genetically different from the original organism, similar to meiosis

b)

genetically identical to the original organism, similar to meiosis

c)

genetically identical to the original organism, similar to mitosis

d)

genetically different from the original organism, similar to mitosis

6.

Which of the following best explains why DNA fingerprints can be used to identify an individual, such as from a crime scene sample?

a)

DNA is inherited from both maternal and paternal parents

b)

DNA from 2 different species can be combined using restriction enzymes

c)

Each individual has a unique DNA sequence, with the exception of identical twins

d)

DNA is used to make proteins during protein synthesis

7.

A nondisjunction mutation is caused by

a)

chromosomes duplicating.

b)

chromosomes fuse together.

c)

chromosomes failing to separate properly.

d)

a nitrogen base being inserted into the DNA sequence.

8.

Genotypes determine the proteins that accumulate to give a phenotype.

a)

True

b)

False

9.

The pedigree above shows the inheritance of color blindness in a family which is an X-linked trait.  What is the genotype of II-6?

a)

Xb Y

b)

XB Xb

c)

XB XB

d)

XB Y

10.

The pedigree above shows the inheritance of color blindness in a family which is an X-linked trait.  What is the genotype of II-5?

a)

Xb Y

b)

XB Xb

c)

Xb Xb

d)

XB XB

11.

 A man with O blood is married to a woman with AB blood. What are the possible blood types of their children?  (Select all that apply)

a)

AB

b)

B

c)

O

d)

A

12.

If you crossed a white chicken with a black chicken and got a chicken with black and white feathers this would mean that this trait would be an example of:

a)

Autosomal dominant trait

b)

Incomplete dominant trait

c)

Sex linked trait

d)

Codominant trait

13.

When does crossing over occur?

a)

Prophase of mitosis

b)

Anaphase of mitosis

c)

Prophase 1 of meoisis

d)

Anaphase 2 of meiosis

14.

Sexual reproduction would be more advantageous than asexual reproduction for organisms living in an environment that is diverse and undergoes frequent changes.

a)

True

b)

False

15.

Genotypes determine the proteins that accumulate to give a phenotype.

a)

True

b)

False

16.

If two heterozygous individuals are crossed, what percent of their offspring are also expected to be heterozygous?

a)

100

b)

75

c)

50

d)

0

17.

The numbers in Figure 10-1 represent the chromosome number found in each of the dog cells shown. The processes that are occurring at A and B are ____.

a)

mitosis and fertilization

b)

meiosis and pollination

c)

mitosis and pollination

d)

meiosis and fertilization

18.

A white mouse whose parents are both white produces only brown offspring when mated with a brown mouse. The white mouse is most probably ____.

a)

homozygous recessive

b)

haploid

c)

heterozygous

d)

homozygous dominant

19.

Only red tulips result from a cross between homozygous red and homozygous white tulips. This illustrates the principle of

a)

complete dominance

b)

independent assortment

c)

segregation

d)

incomplete dominance

20.

The muscle cells of an elephant contain 62 chromosomes. How many chromosomes are in an elephant egg cell?

a)

31

b)

122

c)

224

d)

62

21.

In mink, brown fur color is dominant to silver-blue fur color. If a homozygous brown mink is mated with a silver-blue mink and 8 offspring are produced, how many would be expected to be silver-blue?

a)

6

b)

8

c)

0

d)

3

22.

When homologous chromosomes touch and swap segments of DNA it is called:

a)

Mitosis

b)

Oogenesis

c)

Spermatogenesis

d)

Crossing over

23.

____but if the kittens were both black and white, that would show____

a)

incomplete dominance

b)

Complete Dominance

c)

co-dominance

d)

NA

24.

Mitosis

a)

Identical daughter cells


b)

2N --> 1N

c)

1 Division

d)

Two daughter cells

25.

Meiosis

a)

Genetically different daughter cells

b)

Four daughter cells

c)

2 Divisions

d)

2N --> 2N

26.

Meiosis

a)

Gametes

b)

Somatic cells

c)

2N --> 1N

d)

2N --> 2N

27.

Mitosis

a)

Somatic cells

b)

2N --> 2N

c)

2N --> 1N

d)

Gametes

28.

heterozygous

a)

Bb

b)

BB

c)

bb

29.

homozygous

a)

AA

b)

bb

c)

Ab

d)

BB