Genetics Questions
Explore questions in the Genetics category that you can ask Spark.E!
As the two parental (template) DNA strands separate at a replication fork, each of the strands is separately copied by a DNA polymerase III (orange), producing two new daughter strands (light blue), each complementary to its respective parental strand. Because the two parental strands are antiparallel, the two new strands (the leading and lagging strands) cannot be synthesized in the same way.Drag each phrase to the appropriate bin depending on whether it describes the synthesis of the leading strand, the synthesis of the lagging strand, or the synthesis of both strands.
DNA replication is said to be semiconservative. Which of the following statements correctly explains what this means?
Hershey and Chase used _____ to radioactively label the T2 phage's proteins.
DNA is a double-stranded molecule made up of complementary, antiparallel strands. Based on what you know about complementary base pairing, fill in the rest of the details in the figure.
In analyzing the number of different bases in a DNADNA sample, which result would be consistent with the base-pairing rules?
Various types of chemical bonds or interactions maintain the three-dimensional (3D) structure of large biological molecules like DNA. Not all types of bonds or interactions are shown in all diagrams. The types of bonds or interactions shown depend on the emphasis of the particular diagram.Which of the following diagrams most clearly shows the overall 3D shape and atomic composition of DNA?
There are 40 individuals in population 1, all of which have genotype A1A1, and there are 25 individuals in population 2, all of genotype A2A2. Assume that these populations are located far from one another and that their environmental conditions are very similar. Based on the information given here, the observed genetic variation is most likely an example of:
No two people are genetically identical, except for identical twins. The chief cause of genetic variation among human individuals is:
In nucleotide excision repair, damaged DNA is excised by what enzyme(s)?
Sparrows with average-sized wings survive severe storms better than those with longer or shorter wings, illustrating:
In contrast to the leading strand, the lagging strand is synthesized as a series of segments called Okazaki fragments. The diagram below illustrates a lagging strand with the replication fork off-screen to the right. Fragment A is the most recently synthesized Okazaki fragment. Fragment B will be synthesized next in the space between primers A and B.Drag the labels to their appropriate locations in the flowchart below, indicating the sequence of events in the production of fragment B. (Note that pol I stands for DNA polymerase I, and pol III stands for DNA polymerase III.)
Natural selection changes allele frequencies because some ___ survive and reproduce more successfully than others.
Duplication of chromosomes occurs during S phase of the cell cycle. Duplication requires the separation of complementary DNA strands to allow for DNA replication. Which of the following statements best explains how weak hydrogen bonds function better in this situation than stronger bonds would?
Which of the following diagrams most clearly shows the details of the bonds between nitrogenous bases of complementary nucleotide pairs?
Which of these is responsible for catalyzing the formation of an RNA primer?
E. coli cells grown on 15N15N medium are transferred to 14N14N medium and allowed to grow for two more generations (two rounds of DNADNA replication). DNADNA extracted from these cells is centrifuged. What density distribution of DNADNA would you expect in this experiment?
Short segments of newly synthesized DNA are joined into a continuous strand by _____.
The DNA double helix is composed of two strands of DNA; each strand is a polymer of DNA nucleotides. Each nucleotide consists of a sugar, a phosphate group, and one of four nitrogenous bases. The structure and orientation of the two strands are important to understanding DNA replication.Drag the labels to their appropriate locations on the diagram below. Targets of Group 1 can be used more than once.
The diagram below shows a replication bubble with synthesis of the leading and lagging strands on both sides of the bubble. The parental DNA is shown in dark blue, the newly synthesized DNA is light blue, and the RNA primers associated with each strand are red. The origin of replication is indicated by the black dots on the parental strands.Rank the primers in the order they were produced. If two primers were produced at the same time, overlap them.
As DNA replication continues and the replication bubble expands, the parental double helix is unwound and separated into its two component strands. This unwinding and separating of the DNA requires three different types of proteins: helicase, topoisomerase, and single-strand binding proteins.Sort the phrases into the appropriate bins depending on which protein they describe.