Final answer:
Thelytoky differs from arrhenotoky in that it involves the development of female offspring from unfertilized eggs without the involvement of sperm.
Step-by-step explanation:
The development of female progeny from unfertilized eggs without the use of sperm is how Thelytoky varies from Arrhenotoky.
The process of meiosis produces diploid eggs in thelytoky, and these eggs develop into females without the need for fertilisation. Usually, this method produces female children that are genetically similar. Males fertilise eggs to create females in arrhenotoky, where unfertilized eggs develop into males.
Therefore, Thelytoky produces female progeny without the assistance of sperm, eliminating the requirement for males in the reproductive process.