Table 1. Rescue experiments with a heat shock hsp70: fn1a-mKikGR at shield stage.

For each experiment, fn1a^-/+; fn1b^-/+;hsp70: fn1a-mKikGR adults were crossed. Three crosses include a parent homozygous for the transgene while one cross was from parents both hemizygous for the transgene. Embryos from each clutch were divided in half. 50% of embryos were controls that were not heat shocked, and 50% of embryos were heat shocked at the shield stage. The numbers shown correspond to the total number of embryos presenting each phenotype (either wild-type, fn1a^-/- or fn1a^-/-; fn1b^-/-) based on the presence of somite border defects at the 14–18 somite stage.

	Embryos with no heat shock	Heat shocked embryos
		Fluorescent	Non-fluorescent
Phenotypically wild-type	301	351	26
fn1a-/-	91	0	3
fn1a-/-; fn1b-/-	20	0	4