Question

What is the number of chromosomes in an individual with Turner's syndrome?

• A. $44$
• B. $45$
• C. $46$
• D. $47$

Answer 1

Answer: (B)

$45$

The number of chromosomes in an individual with Turner's syndrome is 45. The disorder is due to monosomy. It appears due to the fusion of abnormal egg (22+0) and a normal sperm (22+X) or a normal egg (22+X) and abnormal sperm (22+0). Such females are sterile as ovaries are rudimentary besides other features including lack of other secondary sexual characters.