bee biology

Is it true a drone has a grandfather but no father?

You could put it that way. The drone arose from an unfertilized egg and so he has one set of chromosomes from the queen (his mother) and no father.

But his mother arose from a fertilized egg. That means she had two sets of chromosomes, one from her mother and one from her father. Since she had a mother and father, her son (the drone we are talking about) could be said to have a grandmother and a grandfather.

These terms are more apt for animals that arise from normal sexual reproduction where each individual has two sets of chromosomes. Bees, along with many other insects, are haplodiploid, meaning sex is based on the number of chromosomes they receive. So the use of the term “grandfather” in this context is kind of a stretch, but if helps you understand, go for it.



  • This quote, about male bees having no father, only a grandfather, I use all the time when teaching about bees. I share it especially when showing the insides of a mason bee tunnel, where it is pretty easy to see the cocoons change size from female (back) to male (front). The quote is a great way to get folk to stop and think (and remember) about how reproduction for bees, (wasps, ants) is very unlike us humans.

  • Drone is a diploid offspring. It has two sets of chromosomes. So the answer is wrong. Right answer is sterile female (nurse) which is produced by unfertilized haploid egg. This sterile female female is a mongoloid individual which has no father.

    • Dear Dr,

      You have it exactly backwards. Haplodiploidy is a sex-determination system in which males develop from unfertilized eggs and are haploid, and females develop from fertilized eggs and are diploid. Look it up anywhere.

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