I think there are 288^4 = 6.88 x 10^9 possibilities. The 4 comes from the four different nucleotides.
pairs of nitrogen bases
The random alignment of homologous pairs of chromosomes during Metaphase 1 allows for independent assortment of genes.
Adenine pairs with thymine and cytosine pairs with guanine.
Adenine pairs with thymine, and cytosine pairs with guanine.
In RNA the nitrgen bases are: A, C, G, U. A pairs with U, and C pairs with G.
Adenine pairs with Thymine(Double bond) Guanine pairs with Cytosine (Triple Bond) A & G are purine bases and T & C are pyrimidine bases.
Adenine pairs with ThymineGuanine pairs with Cytosine
Guanine, [pairs with] Cytosine; Adenine, [pairs with] Thymine.
Adenine pairs with Thymine Cytosine pairs with Guanine
Adenine always pairs with thymine
In DNA, cytosine (C) pairs with guanine (G) and thymine (T) pairs with adenine (A).
the random distribution of the pairs of genes on different chromosomes to the gametes