QuestionSBA
QuestionChoice
Cri du chat syndrome results from a deletion of a part of chromosome 5, not from having an extra chromosome 18.
10024029
e
Cri du chat syndrome
QuestionChoice
Klinefelter syndrome is associated with having an extra X chromosome, resulting in a karyotype of 47, XXY. It does not involve an extra chromosome 18.
10024028
d
Klinefelter syndrome
QuestionChoice
Turner syndrome is characterised by having only one X chromosome, leading to a total of 45 chromosomes (45, X), not an extra chromosome 18.
10024027
c
Turner syndrome
QuestionChoice
Edwards' syndrome, or Trisomy 18, is characterised by an extra copy of chromosome 18. Individuals with Edwards' syndrome typically have severe intellectual and physical disabilities, as well as multiple congenital anomalies. The other syndromes mentioned are caused by different chromosomal abnormalities, and none of them involve an extra chromosome 18.
10024025
a
Edwards' syndrome
QuestionChoice
Down syndrome is caused by an extra copy of chromosome 21 (Trisomy 21), not chromosome 18.
10024026
b
Down syndrome
Concept
Chapter
2693
5720
Abnormalities of Chromosome Number
Topic
283
Genes/Embryology
17203
Which of the following is an example of a chromosome number abnormality in which an individual has an extra chromosome 18?
a