Table 1.

Genotype and phenotype analyses of the F₂ mice generated from intercrossing Tbxt^Δexon6/+ parents

Genotype	Total no. of F2 mice	No. of mice with tail phenotype	Tail phenotype			Intercross (type 1)a	Intercross (type 2)a
			No tail	Short tail	Kinked tail
Tbxt∆exon6/∆exon6	0	0	0	0	0	0	0
Tbxt∆exon6/+	63	21	4	9	8	17 (7)b	46 (14)b
Tbxt+/+	35	0	0	0	0	7 (0)b	28 (0)b

Note that tail phenotypes were categorized into no tail, short tail, kinked tail and long tail, as exemplified in Fig. 3e.

^aFor type 1 intercrossing, at least one of the parent mice has no tail or is short-tailed. For type 2 intercrossing, both parent mice are long-tailed.

^bNumbers in parentheses indicate the total number of mice with tail phenotypes.