Determining the mode of inheritance:
the pedigrees below show the inheritance of three separate, rare autosomal conditions in different families. for each pedigree, decide if the condition is better explained as recessive or dominant.

1vertical line 2 vertical lines 2 vertical lines 1 vertical line 1 horizontal line1 vertical line 2 vertical lines 2 vertical lines 1 vertical line 1 horizontal line1 vertical line 2 vertical lines 2 vertical lines 1 vertical line 1 horizontal line1 vertical line 2 vertical lines 2 vertical lines 1 vertical line 1 horizontal line1 vertical line 2 vertical lines 2 vertical lines 1 vertical line 1 horizontal line1 vertical line 2 vertical lines 2 vertical lines 1 vertical line 1 horizontal line