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WorksheetsIntro to Genetics
Total questions: 32
Worksheet time: 25mins
Name
Class
Date
1.
Two heterozygous parents produce offspring. What is the probability of the HOMOZYGOUS DOMINANT GENOTYPE appearing in the offspring generation?
a)
75%
b)
25%
c)
50%
d)
100%
2.
A heterozygous yellow pea plant's genotype would be:
a)
YY
b)
yy
c)
Yy
d)
Yg
3.
Which of the following cell types is formed by meiosis?
a)
muscle cells
b)
skin cells
c)
sperm cells
d)
blood cells
4.
The sex of an offspring is determined by ______________________.
a)
the mother
b)
the father
c)
the mother and the father
d)
by the environment
5.
Incomplete dominance means that the traits are
a)
expressed equally
b)
dominant
c)
recessive
d)
blended
6.
Term for homozygous organisms that display two dominant phenotypes at the same time
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
linked genes
7.
Who is considered the "father of genetics"?
a)
Gregor Mendel
b)
Reginald Punnett
c)
James Watson
d)
Justin Bieber
8.
What is the percentage of offspring that have green pods?
a)
100%
b)
75%
c)
50%
d)
25%
9.
Another word for homozygous is...
a)
purebred
b)
hybrid
c)
heterozygous
d)
dominant
10.
Alternate form of a gene for a single trait; may be dominant or recessive
a)
Heredity
b)
Genetics
c)
Inheritance
d)
Allele
11.
Segment of DNA on a chromosome that contains instructions for protein synthesis and controls a particular inherited trait
a)
Gene
b)
Pedigree
c)
Punnett Square
d)
Dominant
12.
An allele whose trait always shows up in the organism when the allele is present
a)
Gene
b)
Pedigree
c)
Punnett Square
d)
Dominant
13.
A chart that shows all the possible combinations of alleles that can result from a genetic cross
a)
Gene
b)
Pedigree
c)
Punnett Square
d)
Dominant
14.
An allele that is masked when a dominant allele is present
a)
Recessive
b)
Genotype
c)
Phenotype
d)
Heterozygous
15.
Having two identical alleles for a given trait, either both dominant or both recessive
a)
Homozygous
b)
Selective Breeding
c)
Mutation
d)
Carrier
16.
Dominant alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
17.
Recessive alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
18.
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
19.
The principle of dominance states that:
a)
all alleles are dominant
b)
all alleles are recessive
c)
some alleles are dominant and some are recessive
d)
alleles are neither dominant nor recessive
20.
What is a feature that has different forms in a population?
a)
heterozygous
b)
trait
c)
characteristic
d)
purebred
21.
What does heterozygous mean?
a)
An organism that has the same genes for a trait (TT or tt)
b)
An organism that has different genes for a trait (Tt)
c)
When neither gene is fully dominant; offspring is a mixture of both
d)
the different forms of a trait (hair color--> brown, blonde, red
22.
This is an example of what?
a)
Complete dominance
b)
Incomplete dominance
c)
Codominance
d)
None of the above
23.
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%
24.
Which process and type of resulting cells are represented?
a)
mitosis, gametes
b)
mitosis, body cells
c)
meiosis, gametes
d)
meiosis, body cells
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.
What is a phenotype?
a)
The physical appearance of a trait; what you see.
b)
refers to the genetic makeup of an individual
c)
An organism that has the same genes for a trait (ex. TT or tt)
d)
the passing of traits from parent to offspring
27.
The inherited combination of alleles is known as the offspring's
a)
heredity
b)
phenotype
c)
genotype
d)
redigree
28.
Passing of traits from one generation to the next
a)
Heredity
b)
Genetics
c)
Inheritance
d)
Allele
29.
Which is the correct phenotype for this organism?
a)
BB
b)
blue
c)
green
d)
bb
30.
What is the genotype for this organism?
(E= 3 eyes, e= 1 eye)
(E= 3 eyes, e= 1 eye)
a)
EE
b)
Ee
c)
ee
d)
EE or Ee
31.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
32.
The three most important of Mendel's principles are:
a)
Principle of Segregation; Principle of Dominance; Principle of Evolution
b)
Principle of Segregation; Principle of Independent Assortment; Principle of Heredity
c)
Principle of Independent Assortment; Principle of Dominance; Principle of Recessiveness
d)
Principle of Independent Assortment; Principle of Segregation; Principle of Dominance
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