So, here's this female. She is S/S pb/pb, g/gm or gm/gm. This seems to add up to a genetic burden like hb/hb: She is small for an adult, and lays smaller eggs.

Here are a couple questions:

Which genes here are likely most responsible for this "genetic burden"?

Now imagine this: there's a female hb/hb and a male hb/+... when will the difference in vigor between the offspring show up?

What about the reverse situation: hb/+ female and hb/hb male. Will these offspring all get off to a better start since the female is likely laying larger eggs?