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Life Science Genetics

Total questions: 36

Worksheet time: 31mins

Name
Class
Date
1.

How many chromosomes are in human body cells?

a)

23

b)

46

c)

92

d)

78

2.

What is the passing of traits to offspring?

a)

heredity

b)

dominance

c)

mutation

d)

genotype

3.

How many chromosomes are in human sex cells?

a)

23

b)

46

c)

92

d)

78

4.

What is the genotype for being female?

a)

XX

b)

XY

c)

TT

d)

tt

5.

Which of these is a phenotype?

a)

TT

b)

Tt

c)

tall

d)

homozygous

6.

What is a sudden change in a characteristic caused by a change in the DNA sequence?

a)

allele

b)

phenotype

c)

genotype

d)

mutation

7.

What are the different forms of a gene called?

a)

allele

b)

phenotype

c)

genotype

d)

DNA

8.

Who won the Nobel Prize for discovering the structure of DNA?

a)

Watson and Crick

b)

Watson and Franklin

c)

Crick and Mendel

d)

Wilkins and Obama

9.

Which parent determines the gender of any offspring (in sexually reproducing organisms)?

a)

Male

b)

Female

10.

Who is more likely to be colorblind?

a)

girls

b)

boys

c)

both genders have an equal chance

11.

What is a portion of DNA that codes for a specific trait called?

a)

allele

b)

chromosome

c)

gene

d)

RNA

12.

Each gene is a code for a specific _____

a)

carbohydrate

b)

protein

c)

chromosome

d)

homeostasis

13.

What base pairs with Adenine in a DNA molecule?

a)

thymine

b)

guanine

c)

cytosine

d)

adenine

14.

What is the shape of a DNA molecule?

a)

a hexagon

b)

a parallelogram

c)

a double helix

d)

a twisted triangle

15.

What is it called when neither gene in a gene pair hides the other (instead, they mix)?

a)

Mendelian inheritance

b)

hybridization

c)

incomplete dominance

d)

recessive

16.
Hair color is an example of
a)
genotype
b)
trait
c)
allele
d)
chromosome
17.
If mom plant has a Rr gene and dad has a Rr gene, which is NOT a possible gene combination for the baby plant?
a)
RR
b)
Rr
c)
rr
d)
Ra
18.
An organism's appearance or other detectable characteristic is a what?
a)
phenotype
b)
gene
c)
allele
d)
genetic variation
19.
Passed down through genes from one's parents
a)
acquired
b)
inherited
20.
What structures distinguish a plant cell from an animal cell?
a)
Plant cells have cell walls and ribosomes.
b)
Plant cells have cell walls and chloroplasts.
c)
Plant cells have chloroplasts and ribosomes.
d)
Plant cells have chloroplasts and mitochondria.
21.
Genotype refers to the ...
a)
physical expression of the genes
b)
the possible combination of alleles in a gene
c)
whether an allele is dominant or recessive
d)
how an organism will appear
22.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
23.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
24.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
25.
Two heterozygous (Tt) tall pea plants are crossed. Which describes their offspring?
a)
50% tall and 50% short
b)
75%tall and 25% short
c)
100%short
26.
In DNA which is a correct base pairing?
a)
A with G
b)
G with T
c)
A with U
d)
A with T
27.

RNA is different from DNA in ___

a)

RNA is single stranded

b)

RNA has uracil

c)

All of these

28.

The process of transferring information from DNA to RNA is called

a)

Transcription

b)

Translation

c)

Replication

29.

The process of transferring information from RNA to proteins is called

a)

Transcription

b)

Translation

c)

Replication

30.

The process of selecting and breeding parent organisms to pass on particular traits to offspring is called:

a)

genetic engineering

b)

selective breeding

c)

genome

d)

cloning

31.
What causes mutations?
a)
Mistakes in replication or environmental substances
b)
The amino acids
c)
Passed down by genetics
d)
It's how your born
32.
Which of the following units are repeatedly joined together to form a strand of DNA?
a)
amino acids
b)
nucleotides
c)
fatty acids
d)
polysaccharides
33.
Guanine bonds with ______________.
a)
Adenine
b)
Guanine
c)
Cytosine
d)
Thymine
34.
In a molecule of double-stranded DNA, the amount of Adenine present is always equal to the amount of
a)
cytosine
b)
guanine
c)
thymine
d)
uracil
35.
Which organelle is DNA usually found in?
a)
cell membrane
b)
vacuole
c)
chloroplast
d)
nucleus
36.
What are the three components of a nucleotide?
a)
sugar, hydrogen, nitrogen base
b)
sugar, oxygen, nitrogen base
c)
sugar, phosphate, nitrogen base
d)
sugar, phosphate, protein

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