please explain what Regressive Variation is and Transgressive Variation is and Epistasis mean.

For questions 60-62, answer the following TWO questions for each of the THREE examples of complex inheritance that follows. a. Select the genetic term that best applies: Regressive variation, transgressive variation, or epistasis. Use each term only once. b. Explain the term you have selected for each by illustrating how each of the following could occur. Use properly labeled genotypes to illustrate your answers. 60. Two blue-eyed parents have a brown-eyed child. 61. Phenotypic ratio of 9:7 from a dihybrid cross instead of a 9:3:3:1 ratio. 62. Parents with average sized noses have a child with a huge snout