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Genetics Chapter 6

Total questions: 30

Worksheet time: 18mins

Name
Class
Date
1.
Human males have
a)
one X chromosome only.
b)
two X chromosomes.
c)
one X and one Y chromosome.
d)
two Y chromosomes.
2.
Which of the following combinations of sex chromosomes represents a female?
a)
XY
b)
XXY
c)
XXXY
d)
XX
3.
Gene located on the X or Y chromosome
a)
Homozygous dominant
b)
nondisjunction
c)
Sex-linked gene
d)
Autosomal Disorder
4.
Traits that are controlled by 2 or more genes are called _______________________ traits.
a)
autosomal recessive
b)
sex-linked
c)
codominant 
d)
polygenic 
5.
The man who studied genetics and came up with genetics is
a)
Watson
b)
Crick
c)
Mendel
d)
Darwin
6.
Squidward has light blue skin, and his genotype for this trait is Bb. Would Squidward be considered a purebred or hybrid for light blue skin?
a)
Purebred
b)
Hybrid
7.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
8.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
9.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
10.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
11.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
12.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
13.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
14.
G = green, g = yellow
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
15.
An allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
16.
Which answer best describes codominant alleles?
a)
Both are equally dominant
b)
Both are equally recessive
c)
Neither are dominant or recessive
17.
The study of heredity and the variation of inherited characteristics 
a)
gene
b)
genetics 
c)
meiosis 
d)
hybrid 
18.
An allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
19.
What percentage of the offspring in the punnett square are shown as a hybrid?
a)
100%
b)
75%
c)
50%
d)
25%
20.
What is the percentage of offspring that have green pods?
a)
100%
b)
75%
c)
50%
d)
25%
21.
A human usually has _____ total chromosomes.
a)
6
b)
22
c)
4
d)
46
22.

A person with type O blood

a)

ii

b)

II

c)

IAi

23.

A person who has an allele for a particular trait but does not exhibit the trait.

a)

codominance

b)

incomplete dominance

c)

carrier

24.

A diagram that visualizes a genetic cross.

a)

multiple alleles

b)

Punnett square

c)

sex-linked traits

25.

The mating of organisms to test how they inherit traits.

a)

purebred

b)

genotype

c)

cross

26.

A type of inheritance in which alleles for a trait are neither dominant or recessive, resulting in blending.

a)

incomplete dominance

b)

sex-linked traits

c)

hybrid

27.

The expression (not blending ) of both alleles for a trait in an organism.

a)

purebred

b)

polygenic inheritance

c)

codominance

28.

An example of a sex-linked trait.

a)

color blindness

b)

roan cattle

c)

pink snapdragons

29.

an organisms genetic makeup the way we write it scientifically

a)

carrier

b)

homozygous

c)

genotype

30.

The characteristic that is expressed even when a recessive allele is present.

a)

recessive trait

b)

genetic disorder

c)

dominant trait

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