In the present article, we investigate the properties of bivariate Fibonacci polynomials of order k in terms of the generating functions. For k and l (1 <= l <= k - 1), the relationship between the bivariate Fibonacci polynomials of order k and the bivariate Fibonacci polynomials of order l is elucidated. Lucas polynomials of order k are considered. We also reveal the relationship between Lucas polynomials of order k k and Lucas polynomials of order l. The present work extends several properties of Fibonacci and Lucas polynomials of order k, which will lead us a new type of geneses of these polynomials. We point out that Fibonacci and Lucas polynomials of order k are closely related to distributions of order k and show that the distributions possess properties analogous to the bivariate Fibonacci and Lucas polynomials of order k.