This is the karyotype of a child with a genetically inherited condition called klinefelter's syndrome. review the chromosomes of the child. predict how the child may have ended up with klinefelter's syndrome. a. the karyotype shows an extra x chromosome that could have been inherited either parent. b. the karyotype shows an extra x chromosome that must have been inherited from the mother. c. the karyotype shows an extra chromosome that is the result of a genetic mutation, called substitution. d. the condition is caused by mutagens in the child's environment resulting in a change in chromosome number.