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WorksheetsGenetics
Total questions: 30
Worksheet time: 25mins
Name
Class
Date
1.
Who was the father of genetics
a)
Sagan
b)
Issac Newton
c)
Gregor Mendel
d)
C.jenkins
2.
which is heterozygous ?
a)
Tt
b)
TT
3.
Which is homozygous ?
a)
Zz
b)
SS
4.
A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?
a)
100% BB
b)
75% BB and 25%Bb
c)
50 % BB and 50% Bb
d)
50% Bb and 50% bb
5.
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
6.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
7.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
8.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
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 answer best describes codominant alleles?
a)
Both are equally dominant
b)
Both are equally recessive
c)
Neither are dominant or recessive
12.
B=brown eyes
b= blue eyes
What is true about two brothers that have brown eyes?
One has genotype BB the other Bb.
b= blue eyes
What is true about two brothers that have brown eyes?
One has genotype BB the other Bb.
a)
they have same phenotype and genotype
b)
they have different genotypes and phenotypes
c)
they have same phenotype but different genotypes
d)
they have same genotype but different phenotypes
13.
If a heterozygous tall pea plant is crossed with a short pea plant, what are the possible genotypes of the future offspring?
a)
100% Tt
b)
50% Tt, 50% tt
c)
75%Tt, 25%tt
d)
25%TT, 50%Tt, 25%tt
14.
This is an example of what?
a)
Complete dominance
b)
Incomplete dominance
c)
Codominance
d)
None of the above
15.
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%
16.
A corn plant heterozygous for tall sprouts mates with a corn plant with short sprouts. If tall sprouts are dominant, how many different phenotypes are possible in the offspring?
a)
1
b)
2
c)
3
d)
4
17.
If a Homozygous red snapdragon and a Heterozygous pink snapdragon were crossed - what percentage of the offspring would be homozygous white?
a)
0%
b)
25%
c)
50%
d)
75%
18.
Snapdragon flowers come in red, pink and white. What type of inheritance is this?
a)
Complete Dominance
b)
Incomplete Dominance
c)
Codominance
d)
Polygenic Inheritance
19.
Which process and type of resulting cells are represented?
a)
mitosis, gametes
b)
mitosis, body cells
c)
meiosis, gametes
d)
meiosis, body cells
20.
Which best describes the process shown?
a)
mutation in which the DNA content of the gene is ltered
b)
segregation of sister chromatids
c)
condensation and segregation of the alleles
d)
crossing-over which alleles are exchanged
21.
The sex of an offspring is determined by ______________________.
a)
the mother
b)
the father
c)
the mother and the father
d)
by the environment
22.
Incomplete dominance means that the traits are
a)
expressed equally
b)
dominant
c)
recessive
d)
blended
23.
Term for homozygous organisms that display two dominant phenotypes at the same time
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
linked genes
24.
Red/green color blindness is a recessive trait. A woman who is a carrier for this allele marries a normal-vision male. What is the probability that they will have a child who is color blind?
a)
1/4
b)
1/2
c)
3/4
d)
1
25.
W=white hair
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
a)
none
b)
3/4
c)
1/2
d)
all
26.
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
27.
one set of instructions for an inherited trait
a)
heredity
b)
allele
c)
trait
d)
gene
28.
the chances of something happening
a)
dominant
b)
genotype
c)
phenotype
d)
probability
29.
A characteristic that an organism can pass on to its offspring through its genes
a)
protein
b)
trait
c)
DNA
d)
gene
30.
Complex molecule that carries genetic information that defines an organism's traits. It is stored in the nucleus.
a)
DNA
b)
protein
c)
RNA
d)
glucose nucleic acid (GNA)
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