Each nucleotide is made up of Deoxyribose sugar, Phosphate group and a Nitrogen base. Deoxyribose sugars and Phosphate groups along with sugar-phosphate bonds form the sides of DNA ladder and the Nitrogen bases along with hydrogen bonds make up rungs of the ladder.
In DNA, the "rungs" between the two strands of DNA are formed from the nitrogenous bases adenine, thymine, guanine and cytosine.
The rungs of the DNA ladder are made up of four nitrogen bases. There are two purines-adenine and guanine, and two pyrimidines-cytosine and thymine.
The western skink population would be separated into two groups, and genetic diversity would decline in each group.
Explanation:
It can be explained with the help of a bottleneck effect due to which population size decreases suddenly due to events like a natural disaster, habitat destruction etc.
