Question

DNA replicating enzymes are known to have trouble copying genome regions that contain which class of DNA sequences? These stretches of DNA change in length through the generations and due to their variable lengths within the population, they have been used to analyze relationships between different ethnic human populations:

a. satellite DNAs
b. minisatellite DNAs
c. microsatellite DNAs
d. consensus sequences
e. centromeric DNAs

Answer 1

DNA replicating enzymes struggle with microsatellite DNAs, which are variable in length and useful for analyzing genetic relationships among human populations.

Step-by-step explanation:

The DNA replicating enzymes encounter difficulties when copying genome regions that contain microsatellite DNAs. These are short, repetitive sequences that vary in length among different individuals. Due to this variation, microsatellite DNAs are highly polymorphic and can change in length across generations, making them useful for analyzing relationships between different ethnic human populations and for genetic mapping. This quality allows microsatellites to serve as genetic markers for forensic and paternity testing, as well as population and conservation genetics studies. With their ability to detect genetic similarities and differences, they play a crucial role in mapping the genetic diversity across human populations.