. Author manuscript; available in PMC: 2010 Apr 1.

Published in final edited form as: Dev Biol. 2009 Jan 20;328(1):109–117. doi: 10.1016/j.ydbio.2009.01.014

Table 1.

	Tbx1^+/+		Tbx1^−/−		Tbx1^Cre/+ ;Fgf8^fl/−
Age	Som.	n cells	Som.	n cells	Som.	n cells
E9	16 s	369	14 s	152
	14 s	360	14 s	144
				P=0.001
E9.5	24 s	438	25 s	127	24–26 s	271
	22 s	515	21 s	306		250
	22 s	615	22 s	392		170
				P=0.008		P=0.03
E10.5-11	40 s	540	40 s	479
	39 s	600	39 s	390
	39 s	635	39 s	320
	38 s	696	38 s	190
				P=0.03

Cell count (n cells) of thyroid primordia in embryos with the genotype and developmental stages indicated. P values are referred to comparisons with wild type counts. Som: somite stage.