Monohybrid crosses: The principle of segregation Dihybrid crosses: The principle of independent assortment Extensions of mendel's laws > Forrnulaing and tesing gene的c ypoineses > Mendelian Principles in Animals➢Monohybrid crosses: The principle of segregation ➢Dihybrid crosses: The principle of independent assortment ➢Extensions of Mendel’s laws ➢Formulating and testing genetic hypotheses ➢Mendelian Principles in Animals