How is a spider web like a food chain?

A spiders web spirals outwards to form many layers however you may realise that in a spiders web there is always a starting point much like that of a food chain. A food chain also has many layers which interlink however they have a starting point from which the food chain begins.

Since a female is both xx chromosome and the male passes down the x chromosome, than the offspring would be female since a female is xx.