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WorksheetsBasic Patters of Human Inheritance
Total questions: 9
Worksheet time: 30mins
Name
Class
Date
1.
What is the genotype of a heterozygous organism?
a)
Hh
b)
HH
c)
hh
2.
In a pedigree diagram, ( **DEFINITION: a diagram that can trace a particular trait being passed through generations** ) there is a square and circle. A square means male. What does the circle mean?
a)
Deceased
b)
Newly Born
c)
Female
d)
The carrier (** DEFINITION: an individual who is heterozygous for a recessive disorder)
3.
Albinism is a recessive genetic disorder. An individual who has two recessive alleles will be albino; while an individual with one dominant allele will not. What is the definition of a recessive genetic disorder?
a)
One copy of an abnormal gene must be present for the disease or trait to develop.
b)
Two copies of an abnormal gene must be present in order for the disease or trait to develop?
4.
Look up the following genetic disorders and pick the disorder that is a recessive genetic disorder.
(1)Huntington's Disease
(2)Cystic Fibrosis
(3)Achondroplasia
(1)Huntington's Disease
(2)Cystic Fibrosis
(3)Achondroplasia
a)
Huntington's Disease
b)
Cystic Fibrosis
c)
Achondroplasia
d)
They are all recessive genetic disorders.
5.
If a recessive genetic disorder mean that you need 2 abnormal alleles to express the disorder. What dose a dominant genetic disorder mean?
a)
An individual only needs 1 abnormal allele to express the disorder.
b)
An individual needs 2 abnormal alleles to express the disorder.
c)
An individual will never express the disorder.
d)
An individual needs 3 abnormal alleles to express the disorder.
6.
In a pedigree a solid color means the individual is either homozygous dominant or homozygous recessive for the trait being tracked. What does it mean to have 2 colors in a circle or square?
a)
Dominant
b)
Heterozygous
c)
Male
d)
Homozygous
7.
What does this pedigree mean?
a)
Two parent have 3 offspring. All are heterozygous for the traced trait.
b)
Two parents have 3 offspring. All are homozygous. Two individuals have the traced trait.
c)
Three parents have 2 offspring. All are heterozygous for the traced trait.
d)
Three parents have 2 offspring. All individuals are homozygous. Two individuals have the traced trait.
8.
What is a carrier?
a)
An individual is heterozygous for a dominant recessive genetic disorder.
b)
An individual is homozygous for a recessive genetic disorder.
c)
An individual is heterozygous for a recessive genetic disorder.
d)
An individual is homozygous for a dominant genetic disorder.
9.
Can an individual be a carrier for a dominant genetic disorder.
a)
Yes
b)
No
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