Why is the duplication of chromosome necessary for mitosis?
When one cell divides into two, both must have a copy of the genetic information. Therefore, before cell division occurs, the genes must also make duplicates of themselves so that all of the important genetic information ends up in each of the new cells.
What is the importance of such duplication?
Gene duplication is an important mechanism for acquiring new genes and creating genetic novelty in organisms. Many new gene functions have evolved through gene duplication and it has contributed tremendously to the evolution of developmental programmes in various organisms.
What is the importance of gene duplication in molecular evolution?
The most obvious contribution of gene duplication to evolution is providing new genetic material for mutation, drift, and selection to act upon, making new evolutionary opportunities possible (Zhang 2003).
Why is the duplication of chromosomes necessary for meiosis?
Because meiosis creates cells that are destined to become gametes (or reproductive cells), this reduction in chromosome number is critical — without it, the union of two gametes during fertilization would result in offspring with twice the normal number of chromosomes!
Why would it be important to replicate DNA before a cell divides in mitosis or meiosis?
DNA replication needs to occur because existing cells divide to produce new cells. Each cell needs a full instruction manual to operate properly. So the DNA needs to be copied before cell division so that each new cell receives a full set of instructions!
Why is it important that the cell’s DNA is duplicated before cell division?
Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell. … Once the DNA in a cell is replicated, the cell can divide into two cells, each of which has an identical copy of the original DNA.
What is an example of chromosomal duplication?
A person with a duplication has three copies of a particular chromosome segment instead of the usual two copies. Like deletions, duplications can happen anywhere along the chromosome.  Some examples of duplication syndromes include 22q11. 2 duplication syndrome and MECP2 duplication syndrome.
What do you mean by duplication?
1a : the act or process of duplicating. b : the quality or state of being duplicated. 2 : duplicate, counterpart. 3 : a part of a chromosome in which the genetic material is repeated also : the process of forming a duplication.