alleryStart learning →Which set of features describes Turner syndrome?
AA single X, short stature, webbed neck, sterility
BThree X chromosomes, female, some delay in development
CAn X and a Y, small testes, reduced body hair present
DTwo X and a Y, male, with several Barr bodies present
Answer & Solution
Correct answer: A. A single X, short stature, webbed neck, sterility
1. Turner syndrome is characterised by an X0 genotype, meaning only a single sex chromosome.
2. The individual is phenotypically female with short stature and webbed skin in the neck region.
3. Hearing and cardiac impairments and sterility also occur.
4. Three X chromosomes describes triplo-X, whose carriers are female with developmental delays and reduced fertility.
5. Small testes and reduced body hair belong to Klinefelter syndrome, whose carriers have an XXY genotype.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 13 "Modern Understandings of Inheritance", section 13.2 Chromosomal Basis of Inherited Disorders_
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