Mules are ____ between horses and donkeys. Some traits such as eye colors and heights are ____ from parents to their children. Every ____ has a unique DNA makeup. Gene therapy, which is any ____ using genes, is no longer just science fiction. She ____ her curly hair from her mother. Several disorders are caused by ____ genes. Scientists have used different methods to ____ stem cells for medical purposes. Mosquitoes can ____ and transmit malaria to people they bite.

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