The pedigree chart below shows the individuals in a family who exhibit a certain trait. Based on the information in the chart, which of the following provides the best evidence that this is a recessive trait?

Question

anonymous · Answer

alt=
		
Couple 3-4 in the 2nd generation produced children who do not show the trait.
		
Couple 1-2 in the 2nd generation produced children who do show the trait.
		
Couple 3-4 in the 2nd generation produced children who are identical twins.
		
Couple 1-2 in the 1st generation produced children who do show the trait.