FECUNDATION
Fecundation is the combination of genes derived from both sexes generating a new individual. The proposal by the LOQI logo convey the process of fecundation using each source.

Solution

Each source by expressing the process of fertilization: 
"L" shaped phallic where fertilization begins 
"O" to be fertilized ovule 
"Q" Ovum united with sperm 
 "I"  fertilized ovule