#1
Which of the following is a chromosomal abnormality?
Down syndrome
ExplanationGenetic disorder caused by an extra copy of chromosome 21.
#2
What is the typical chromosomal composition of a person with Down syndrome?
Trisomy 21
ExplanationPresence of an extra chromosome 21.
#3
Which chromosomal abnormality is characterized by the presence of an extra X chromosome in females?
Klinefelter syndrome
ExplanationCondition where males have XXY chromosomes.
#4
What is the name of the chromosomal disorder where a portion of chromosome 5 is deleted?
Cri du chat syndrome
ExplanationDeletion in the short arm of chromosome 5.
#5
In which gender does Klinefelter syndrome occur?
Male
ExplanationGenetic condition affecting males with an extra X chromosome (XXY).
#6
Which of the following is a characteristic feature of Klinefelter syndrome?
Underdeveloped testes
ExplanationPhysical trait related to the reproductive system in males with Klinefelter syndrome.
#7
Which chromosomal abnormality is also known as 'trisomy 18'?
Edwards syndrome
ExplanationGenetic disorder involving an extra copy of chromosome 18.
#8
Which of the following is a characteristic feature of Turner syndrome?
Webbed neck
ExplanationPhysical trait associated with Turner syndrome.
#9
What is the genetic cause of Cri du chat syndrome?
Deletion of a portion of chromosome 5
ExplanationCondition caused by the absence of a segment in chromosome 5.
#10
Which chromosomal abnormality is associated with a characteristic cat-like cry in infants?
Cri du chat syndrome
ExplanationDistinctive cry associated with this genetic disorder.
#11
Which chromosomal abnormality is characterized by the presence of an extra Y chromosome in males?
Klinefelter syndrome
ExplanationCondition where males have an additional Y chromosome (XXY).
#12
Which of the following is a characteristic feature of Edwards syndrome (trisomy 18)?
Heart defects
ExplanationCommon physical anomaly associated with Edwards syndrome.
#13
Which of the following chromosomal abnormalities is not compatible with life?
Edwards syndrome
ExplanationGenetic disorder associated with severe abnormalities and often fatal.