Question

The genotype of a person with Turner’s syndrome will be:

Options

• 44 + XXY

• 44 + XYY

• 44 + XO

• 44 + XXYY

Answer 1

44 + XO

Explanation:

Turner’s syndrome is caused by the presence of only one X chromosome and no second sex chromosome (monosomy X), resulting in a total of 45 chromosomes (44 autosomes + XO). Individuals with Turner’s syndrome are genetically female but sterile, with underdeveloped ovaries, and present characteristic physical features such as a webbed neck and broad chest. This condition arises due to nondisjunction during gamete formation leading to monosomy of the X chromosome.