A female patient’s cells were being examined, and it was discovered that each of her cells...
A female patient’s cells were being examined, and it was discovered that each of her cells contained two Barr bodies, instead of only one as is usually observed. What does this indicate about her genome? What caused this to occur? Explain the process. (1.5 marks)
b) Why does this abnormality usually result in an individual having a normal phenotype? Explain this process. (2.5 marks)
Homework Answers
And
Barr bodies are the inactivated X chromosome in the somatic cells. If a female has 2 barr badies then she must have 47 chromosomes with XXX as the sex chromosome
Bar bodies are formed in order to keep only enough amount of genetic material required. Hence body inactivates any X chromosome more than 1 inside the cells.
As the amount of expression of the X chromosome is restored inside the cells the individual has a normal phenotype.
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