WorksheetsGenetics
Total questions: 40
Worksheet time: 20mins
Name
Class
Date
1.
What is the passing of traits from parents to their offspring?
a)
heredity
b)
genetics
2.
What is the study of how traits are passed from parents to offspring?
a)
genetics
b)
genotypes
c)
phenotypes
d)
alleles
3.
Who is the monk who was coined the "father of genetics"?
a)
Gregor Mendela
b)
Gregor Mendel
c)
Grigg Mendela
d)
Spongebob
4.
Gregor Mendel discovered the principles of heredity by growing and observing
a)
corn plants
b)
pea plants
c)
bean plants
5.
A genetic factor that blocks another genetic factor is a
a)
dominant trait.
b)
recessive trait.
6.
A genetic factor that IS BLOCKED by the presence of a dominant factor is a
a)
dominant trait.
b)
recessive trait.
7.
Dominant genes are always expressed by
a)
a capital letter. "A"
b)
a lowercase letter. "a"
8.
Recessive genes are represented by
a)
a capital letter. "A"
b)
a lowercase letter. "a"
9.
What are the different forms of a gene?
a)
alleles
b)
genotypes
c)
phenotypes
d)
homozygous
10.
Two alleles that control the phenotype of a trait are
a)
alleles
b)
genotype
c)
phenotype
d)
Punnett Square
11.
The expression of a trait, or the appearance of an organisim, is
a)
allele
b)
genotype
c)
phenotype
12.
An organism that has both alleles the same for a trait (tt or TT)
a)
homozygous or homogenous
b)
heterozygous
13.
An organism that has unlike alleles for a trait are called
a)
homozygous or homogenoug
b)
heterozygous
14.
Only one allele in the genotype is seen in the phenotype
a)
co-dominance
b)
complete dominance
c)
incomplete dominance
15.
Both alleles in the genotype are seen in the phenotype
a)
complete dominance
b)
co-dominance
c)
incomplete dominance
16.
Mixture of alleles in the genotype is seen in the phenotype
a)
complete dominance
b)
co-dominance
c)
incomplete dominance
17.
A section on a chromosome that has genetic information for one trait is called
a)
a gene.
b)
an allele.
c)
a phenotype.
d)
a genotype.
18.
When two alleles of a gene are the same (ex. RR or rr) they are
a)
homozygous.
b)
heterozygous.
19.
When two alleles of a gene are different ( ex. Rr) they are
a)
homozygous.
b)
heterozygous.
20.
A model used to predict possible genotypes and phenotypes of offspring is called a
a)
Pun Nit Square
b)
Punnett Square
c)
Pawn It Square
21.
When the offspring's phenotype is a combination of the parent's phenotype
(ex. red flower + white flower = pink flower)
(ex. red flower + white flower = pink flower)
a)
Incomplete Dominance
b)
Complete Dominance
c)
Co-Dominance
22.
When both alleles can be observed in a phenotype
(ex. red flower + white flower = combined red and white flowers)
(ex. red flower + white flower = combined red and white flowers)
a)
Incomplete Dominance
b)
Co-Dominance
c)
Complete Dominance
23.
Deoxyribonucleic Acid; an organisim's genetic material is called
a)
DNA
b)
DRA
c)
DOA
24.
A molecule made of a nitrogen base, a sugar, and a phosphate group is a
a)
glucotide.
b)
nucleotide.
c)
genotide.
25.
Thymine always pairs with
a)
Cytosine.
b)
Adenine.
26.
Guanine always pairs with
a)
Cytosine.
b)
Adenine.
27.
The sequence of one strand of DNA is ATTCGTAG. The sequence of the complimentary strand would be
a)
ATTCGTAG.
b)
TAAGCATC.
c)
GATGCTTA
d)
CTACGAAT.
28.
Sarah's mother is heterozygous for brown eyes (Bb). Sarah's father is homozygous recessive for blue eyes (bb). Complete the Punnett Square. What are the chances Sarah has blue eyes?
a)
0%
b)
25%
c)
50%
d)
100%
29.
A black cow that is heterozygous (Bb) is crossed with a white bull (bb). What are the chances of producing a black calf?
a)
0%
b)
25%
c)
50%
d)
100%
30.
Hemophilia is a recessive sex-linked trait on the X chromosome. In a cross between a male with hemophelia (XhY ) and a female that is a carrier of hemophelia (XHXh), what are the chances that one of the female offspring will have hemophilia? Complete the Punnett Square.
a)
0%
b)
25%
c)
50%
d)
100%
31.
Black and white coat colors in cattle are considered co-dominant. If a black cow (BB) is crossed with a white bull (WW), what are the chances that the offspring will be white (WW)? Complete the Punnett Square.
a)
0%
b)
25%
c)
50%
d)
100%
32.
Blue and red colors in tulips are incomplete dominant. A blue tulip (BB) is crossed with a red tulip (RR). Complete the Punnett Square. What percentage will be purple flowers?
a)
0%
b)
25%
c)
50%
d)
100%
33.
How many chromosome pairs/ groups are seen in this karyotype?
a)
b
b)
a
34.
Each box of the Punnett square represents what percent?
a)
10%
b)
15%
c)
25%
d)
20%
35.
An incomplete dominance cross between homozygous red and homozygous white flowers produces
a)
some red and some white
b)
pink flowers
c)
red and white spotted flowers
d)
red flowers
36.
A normal human male's sex chromosomes
a)
XX
b)
XXY
c)
XY
d)
YY
37.
A normal human female's sex chromosomes
a)
XX
b)
XXY
c)
XY
d)
YY
38.
How many chromosome pairs are seen in this karyotype?
a)
23
b)
46
c)
22
d)
24
39.
Are there any abnormalities seen in this karyotype?
a)
yes
b)
no
40.
Choose the best description of the abnormality.
a)
The sex chromosome pair (23) has an extra chromosome, 3 total instead of just 2.
b)
The sex chromosome pair (22) has 3 total instead of just 2.
c)
The sex chromosome pair (22) is missing one, 2 total instead of 3.
100 %
