Concept explainers
Videos
Why is
To explain: The reason why DNA replication is called “semiconservative”.
Introduction: Deoxyribonucleic acid (DNA) is the genetic material of prokaryotes, archaea, eukaryotes, and some viruses. Replication of DNA results in two copies of DNA that are split into two cells at the end of cell division. Replication is the starting mechanism in the central dogma.
Explanation of Solution
There are three proposed models of DNA replication:
- • Conservative model
- • Semiconservative model
- • Dispersive model.
Semiconservative model is the widely accepted and experimentally proved model. According to this model, each copy of the DNA replicated contains a parent strand.
Meselson–Stahl experiment supported the Watson and Crick model of DNA and provided evidences for semiconservative model of DNA replication.
In semiconservative replication, the two strands of parental DNA are used as a template each and a new strand is synthesized with enzymes and nucleotides. Thus, each daughter strand has a parental strand and a newly synthesized strand. Since a parental strand is conserved in daughter DNA, it is called semiconservative DNA replication.
Want to see more full solutions like this?
- Not part of a graded assignment, from a past midtermarrow_forwardNoggin mutation: The mouse, one of the phenotypic consequences of Noggin mutationis mispatterning of the spinal cord, in the posterior region of the mouse embryo, suchthat in the hindlimb region the more ventral fates are lost, and the dorsal Pax3 domain isexpanded. (this experiment is not in the lectures).a. Hypothesis for why: What would be your hypothesis for why the ventral fatesare lost and dorsal fates expanded? Include in your answer the words notochord,BMP, SHH and either (or both of) surface ectoderm or lateral plate mesodermarrow_forwardNot part of a graded assignment, from a past midtermarrow_forward
- Explain in a flowcharts organazing the words down below: genetics Chromosomes Inheritance DNA & Genes Mutations Proteinsarrow_forwardplease helparrow_forwardWhat does the heavy dark line along collecting duct tell us about water reabsorption in this individual at this time? What does the heavy dark line along collecting duct tell us about ADH secretion in this individual at this time?arrow_forward
Human Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage Learning
Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning
Human Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning
Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College
Biology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage Learning