Question 1
What is a chromosomal aberration?
CORRECT ANSWER
Alteration to the chromosome that results in a change to the total number of chromosomes,
deletions or additions to the chromosome, or even complete rearrangement of
chromosomal segments.
Question 2
Do sex chromosomes occur in pairs?
CORRECT ANSWER
No
Question 3
Is trisomy/monosomy in autosomal chromosomes tolerated better in plants or animals?
CORRECT ANSWER
Tolerated in plants
Question 4
What is down syndrome?
1
@THE STUDY VAULT
, CORRECT ANSWER
Trisomy 21; individuals that are afflicted with Down syndrome typically exhibit only a subset
of the stereotypical characteristics of the disorder; Down Syndrome Critical Region (DSCR)
encodes for a protein that blocks vascular epithelial growth gactor
Question 5
How does maternal age correlate with the incidence of down syndrome in fetuses?
CORRECT ANSWER
Incidence of down syndrome increases with maternal age
Question 6
If Down syndrome presents more than once in a family, do individuals typically have
identical phenotypes of the disorder?
CORRECT ANSWER
No
Question 7
What region of the chromosome is thought to be responsible for the phenotype of down
syndrome?
CORRECT ANSWER
Down Syndrome Critical Region (DSCR)
Question 8
Why do researchers think that individuals with Down syndrome are protected from
cancers that cause solid tumors?
2
@THE STUDY VAULT
What is a chromosomal aberration?
CORRECT ANSWER
Alteration to the chromosome that results in a change to the total number of chromosomes,
deletions or additions to the chromosome, or even complete rearrangement of
chromosomal segments.
Question 2
Do sex chromosomes occur in pairs?
CORRECT ANSWER
No
Question 3
Is trisomy/monosomy in autosomal chromosomes tolerated better in plants or animals?
CORRECT ANSWER
Tolerated in plants
Question 4
What is down syndrome?
1
@THE STUDY VAULT
, CORRECT ANSWER
Trisomy 21; individuals that are afflicted with Down syndrome typically exhibit only a subset
of the stereotypical characteristics of the disorder; Down Syndrome Critical Region (DSCR)
encodes for a protein that blocks vascular epithelial growth gactor
Question 5
How does maternal age correlate with the incidence of down syndrome in fetuses?
CORRECT ANSWER
Incidence of down syndrome increases with maternal age
Question 6
If Down syndrome presents more than once in a family, do individuals typically have
identical phenotypes of the disorder?
CORRECT ANSWER
No
Question 7
What region of the chromosome is thought to be responsible for the phenotype of down
syndrome?
CORRECT ANSWER
Down Syndrome Critical Region (DSCR)
Question 8
Why do researchers think that individuals with Down syndrome are protected from
cancers that cause solid tumors?
2
@THE STUDY VAULT
