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Most ants, bees and wasps exhibit haplodiploidy wherein males are haploid and develop from unfertilized eggs while females are diploid and develop from fertilised eggs. Which of the following would be true if the genetic relatedness between two daughters from the same mother is humans and ants are compared?
The genetic relatedness will be
Less by a factor of 0.5 in ants
Same in both cases.
Greater by a factor of 0.25 in ants
Greater by a factor of 0.5 in ants.
Answers (1)
In haplodiploid organisms like ants, bees, and wasps, the genetic relatedness between full sisters is typically higher than in humans due to the haplodiploid mode of reproduction. Full sisters in haplodiploid organisms share, on average, three-fourths of their alleles due to the unique genetic inheritance pattern.
In contrast, in humans, full sisters share, on average, half of their alleles from their common parents. Therefore, the genetic relatedness between sisters in haplodiploid organisms like ants is expected to be greater by a factor of 0.25 compared to the relatedness between human sisters.
Hence, option 3 is the correct choice: The genetic relatedness will be greater by a factor of 0.25 in ants compared to humans.
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