We call a depurination when the covalent bond between the deoxyribose and an adenine, or guanine, breaks without damaging the DNA backbone of phosphate and deoxyribose.
a) deamination - cytosine to uracil
b) pyrimidine dimers - double bonds on adjacent bases form a ring coupling them together
c) alkylation - guanine to methyl-guanine
d) depurination - creating an apurinic site

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. an incomplete dominance cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. purple offspring result. then, two of the purple offspring are crossed. according to the punnett square for this cross, how many of the offspring from the second cross will have a feather color that results from incomplete dominance? 1 in 4 2 in 4 3 in 4 4 in 4

What causes eclipses? check all that apply. earth's rotation on its axis moon's shadow covering the sun earth's shadow covering the moon earth's orbit and moon's orbit occasionally aligning the moon and sun's gravity pulling in the same direction

Which of the following describes a bathypelagic zone