If a human female has two Barr bodies,it is almost certain that
A)her father had at least one Barr body.
B)her mother also had two Barr bodies.
C)she developed from a fertilized egg with 3 X chromosomes.
D)she is actually a male with female characteristics.
E)she is genetically a normal fertile femalE.

Question

Quizplus · Accepted Answer

Barr bodies are inactive X chromosomes, and typically, only one X chromosome is activated in each cell of a female. Therefore, if a female has two Barr bodies, it means there are three X chromosomes present, and the female developed from a fertilized egg with 3 X chromosomes, a condition known as Triple X syndrome or Trisomy X. This condition is not always accompanied by physical or intellectual abnormalities, but there is an increased risk for developmental delays or learning disabilities, especially if there are additional chromosome abnormalities.

If a Human Female Has Two Barr Bodies,it Is Almost