There are discrete yes or no genes ('loose' ear lobes or joined-on; either can roll your tongue or cannot; blue or brown eyes (in the most simplistic form); sex - male or female (not quite the same as the others a sthis is dealt with by a whole chromosone being present or not).
Then there are continuous genetic variations such as height (short, tall, or anywhere in between).
Then there might be other things which affect the variation which are not genetic - the environmental factors (diet, for instance might affect height).
DrS is eminently more qualified to explain, but that is the 'bare bones' of it.
We, as humans, are all different because only about 50% are male and about 50% are female. Split each of those 'groups' into eye colour and we have more variant options; taking into account other discrete genetic possibilities gives a huge number of possible combinations without even addressing the continuous characteristics.
The drones are actually half their mother, as they are haploid and mum is diploid, but remember half of her genes came from her dad and the drones are a mixture of 'dad' genes and 'mum' genes because the drone genes were produced by meiotic cell division (basically mixing of genes and finishing with that haploid state of half the diploid chromosone count (whereas mitotic cell division results in two cloned cells - each identical to the other).
So, like Skyhook says, it's a bit more complicated than that!
Regards, RAB