Biochemistry/Molecular Biology?

Here are some questions, please help me with them. If convenient, please briefly tell me how the answer comes out. Thanks.





1. In the cross AaBb*AaBb, Mendel's principle of independent assortment predicts that the ratio of the four possible phenotype of the offspring will be


a)1:1:1:1


b)3:2:2:1


c)4:2:2:1


d)9:3:3:1


e)9:7:3:1





2. A solution contains DNA Polymerase I, Mg2+ salts of dATP, dGTP, dCTP and dTTP, and an appropriate buffer. Which of the following DNA molecules would serve as a template for DNA synthesis when added to this solution?


a)a single-stranded closed cycle


b)a single-stranded closed circle base-paired to a shorter linear strand with a 3'-terminal phosphate.


c)a single-stranded closed circle base-paired to a shorter linear strand with a 3'-terminal phosphate.


d)a double-stranded closed circle.


e)a blunt-ended closed circle molecule with a 3'-terminal hydroxyl at each end.

Biochemistry/Molecular Biology?
1a) equal numbers of all phenotypes





2e)