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? (4 points)
A. Couple 3−4 in the 2nd generation produced children who do not show the trait.
B. Couple 1−2 in the 2nd generation produced children who do show the trait.
C. Couple 3−4 in the 2nd generation produced children who are identical twins.
D. Couple 1−2 in the 1st generation produced children who do show the trait.
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D should be your ans.....
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