Mark has brown hair. his wife, maggie, also has brown hair. mark and maggie have four children. three children have brown hair, and one child has blonde hair. what is the most likely explanation for this? a. repeated dying of the fourth child's hair resulted in a permanent color change. b. the blond hair was a result of the expression of a recessive gene. c. the fourth child was born with brown hair, but it later turned blonde. d. the blonde hair was a result of a genetic mutation.