DNA/Genetic Disorder
Quiz Review
Any change in a gene or
chromosome is a:
A.Pedigree
B.Mutation
C.Karyotype
D.Genome
B
A mutation is harmful to an
organism if it:
A.Changes the DNA of the organism
B.Changes the phenotype
C.Reduces its chance of survival
D.Makes the organism better able to
avoid predators
C
Which nitrogen base is NOT
part of DNA?
A.Adenine
B.Guanine
C.Cytosine
D.Uracil
D
What combination of sex
chromosomes do males have?
A.Two X chromosomes
B.Two Y chromosomes
C.One Y chromosomes
D.One X chromosome and one Y
chromosome
D
A chart that tracks which members of a
family have a particular trait is called a:
A.Karyotype
B.Pedigree
C.Punnett sqaure
D.Genome
B
A genetic disorder in which a person’s
blood clots very slowly if at all is:
A.Sickle-cell disorder
B.Cystic fibrosis
C.Down’s syndrome
D.Hemophilia
D
The __________ chromosome
determine if a person is a male or
female.
A.Multiple
B.Sex
C.Recessive
D.Gene
B
An abnormal condition that a person
inherits through genes or chromosomes is
a:
A.Pedigree
B.Gene therapy
C.Genetic disorder
D.Karyotype
C
DNA is __________material that
carries information about a organism
and is passed from parent to offspring.
A. Phosphate
B. Genetic
C. Helix
D. Protein
B
Hemophilia is an X-linked recessive trait.
Do a cross for a normal father and a
mother who is a carrier of hemophilia.
 Typically blood clotting – H
 Hemophilia - h
Check answers hanging next
agenda
X
What is the probability that they will have a
child with hemophilia?
25%
What is the probability that they will have a
child who is a carrier of the gene?
25%
Hemophilia is an X-linked recessive trait.
Do the cross for a father with
hemophilia and a mother who is normal.
Check answers hanging next
to agenda.
What is the probability that they will have a
girl with hemophilia?
 0%
What is the probability that they will have a
child who is a carrier of the gene?
 50%
How many carriers are there
in this pedigree?
 4
How many females have the
trait?
 1
Is this pedigree sex-linked?
Explain how you know.
 This pedigree could be
sexlinked because there are
no males carriers. In sex
linked pedigrees, males
cannot be carriers because
the Y does not carry an
allele.
What does this karyotype
show?
A. A female with down’s
syndrome
B. A male with down’s
syndrome.
C. A normal male
D. A normal female
 C
 A change in the chromosomes
can cause a genetic disorder.
 True or False?
 true
A picture of all the chromosomes in the cell
is called a:
A.Pedigree
B.Genotype
C.Karyotype
D.Phenotype
 C