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Genetics Challenge

Total questions: 35

Worksheet time: 39mins

Name
Class
Date
1.
The large variety of human dog breeds is a result of hundreds of years of what?
a)
Genetic Engineering
b)
Cloning
c)
Natural Selection
d)
Selective Breeding
2.

Which of the following is homozygous recessive?

a)

Rr

b)

RR

c)

rr

d)

All of them

3.

Which term describes the different forms of a gene?

a)

Chromosome

b)

Allele

c)

DNA

d)

Punnett Squares

4.

What does a Punnett Square do?

a)

Show the possible genotypes

b)

Determine the possible phenotypes

c)

Predict offspring traits

d)

All of the above

5.

This image shows a

a)

Phenotype

b)

Punnett Square

c)

Homozygous Dominant gentotype

d)

Pedigree

6.

A phenotype is

a)

Physical appearence

b)

Dominance

c)

Recessiveness

d)

Letter combinatons

7.

Which of the following matches this description of a chromosome?

a)

Different forms of a gene

b)

Threadlike structures made of DNA molecules that contain the genes

c)

A complex molecule containing the genetic information that makes up the chromosomes.

d)

A segment of DNA on a chromosome that codes for a specific trait

8.
In humans, a male has...
a)
One X and one Y chromosome.
b)
Two X chromosomes.
c)
Two Y chromosomes.
d)
One X chromosome only.
9.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
10.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
11.
Which of the following genotypes would be considered heterozygous?
a)
BB
b)
gg
c)
Ff
d)
TT
12.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
13.
phenotypes that is a blend of the heterozygous gene pair
a)
incomplete dominance
b)
multiple alleles
c)
regulatory genes
14.
has more than 2 variations
a)
regulatory genes
b)
multiple alleles
c)
mendelian inheritance
15.
phenotypes that shows both traits
a)
semi-dominant
b)
heterozygous
c)
codominance
16.
Which characteristic is inherited?
a)
hair color
b)
sleeping late
c)
enjoying hiking
d)
loving to read
17.
Which is an example of a learned behavior? 
a)
Blue eyes
b)
Being upset
c)
Speaking English 
d)
Having freckles 
18.
If T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
19.
In the Punnett square shown, what must the genotype of the missing parent be?
a)
BB
b)
Bb
c)
bb
d)
Tt
20.
B = brown fur  b = white fur
In the Punnett square, what is the probability for white fur? 
a)
0%
b)
25%
c)
50%
d)
75%
21.

B - black, b - brown. Two black mice mate and have some black and some brown mice. What is the genotype of the parents?

a)

BB x Bb

b)

BB x bb

c)

Bb x Bb

d)

Can't determine

22.
What genotype would go in box 3?
a)
BB
b)
Bb
c)
bb
23.
If two parents have type AB blood, what is the probability that their child will have type O blood?
a)
0%
b)
25%
c)
50%
d)
100%
24.

A woman has type B blood and her husband has type O blood. What must be the woman's genotype, if they have a child with type O blood?

a)

IB i

b)

IB IB

c)

ii

d)

type B blood

25.
What kind of cells are made in MEIOSIS?
a)
Haploid Gametes
b)
Diploid Somatic Cells
c)
Skin Cells
d)
Liver Cells
26.
Diploid Cells are represented by
a)
2n
b)
n
c)
4n
d)
1/2 n
27.
When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _________________ occurs
a)
crossing over
b)
mutagenesis
c)
hybridization
d)
fertilization
28.
The chromosomes that pair up during meiosis, are called __________ chromosomes.  
a)
homozygous 
b)
asexual
c)
homologous
d)
genes
29.
How many daughter cells are produced at the end of meiosis?
a)
1
b)
2
c)
3
d)
4
30.
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
31.
Which of the following best describes a DNA molecule?
a)
double helix
b)
contains ribose
c)
made of amino acids
d)
contains Uracil
32.
Adenine bonds with ______________.
a)
Guanine
b)
Thymine
c)
Cytosine
d)
Adenine
33.
What determines the code, or information, of a DNA molecule?
a)
the shape (structure) of the nitrogen bases
b)
the order (sequence) of the nitrogen bases
c)
the color of the nitrogen bases
d)
the frequency (number) of nitrogen bases
34.
Any change in the sequence of DNA is...
a)
transgenic shift
b)
Single Genotype
c)
Monohybrid Trait
d)
Mutation
35.
The two strands in a DNA molecule are held together by ...
a)
hydrogen bonds
b)
phosphodiester bonds
c)
covalent bonds
d)
ionic bonds

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