Importance of DNA Copying and Variation among organisms.
Creation of DNA copies in reproduction
The organism of the same species looks similar because their body design is the same, reproduction among the organism involves making copies of the blueprint of the body design. Chromosomes in the nucleus of the cell contain information for the inheritance of features from parents to the next generation in the form of DNA. The DNA in the cell nucleus is the information source for making proteins, therefore the most important event during the reproduction is the creation of the DNA copy. Reproductive cells use chemical reactions to build copies of their DNA in a reproducing cell, one copy of DNA remains in the original cell and the other one is pushed out which instantly generates additional cellular apparatus for maintaining life processes subsequently the DNA copy is separated, each with its own cellular apparatus, this is how the cell divides to give rise to two cells.
Is the DNA of the offspring is identical to the DNA of the Parent?
Two DNA copies are accommodated by two identical cells during the process of reproduction actually not absolutely identical, the extent of accuracy of both DNA copies depends on the biological reaction between both parent cells. It is expected that copying the DNA will have some variation each time from one generation to the next generation but may not be similar to the original one. If variations occur are acute then DNA copy might not work with the cellular apparatus it inherits, such a cell simply dies.
Creation of the DNA during the meiosis in the process of reproduction, there are some changes in its formation, DNA of the offspring cell is different from the parent cell due to the biological reaction between both parent cells.The change in the DNA is the change in the information of inheritance, this altered DNA copy will code for the protein different from the original one.It depends on the extent of accuracy in DNA replication, and how much similarity there is between parent and offspring. Variation during reproduction is the tendency of the organisms that leads the path of evolution.
Importance of Variation
Variation in DNA replication helps to increase the population of organisms in a nitches, changes in DNA and body design is actually maintenance of body design features that allow the organism to use that particular niche. Variation in DNA replication is linked to the stability of the population of species.
Click for online shopping
Future Study Point.Deal: Cloths, Laptops, Computers, Mobiles, Shoes etc
However, nitches can change beyond the control of the organisms, as an example temperature on the earth were to be increased by global warming. Most of the bacteria would die, but the few variants resistant to heat would survive and grow further. Variation is thus useful for the survival of species over time.
Class 9 Biology Important Notes
Difference between Animal cell and Plant Cell
What is the difference between Prokaryotic Cell and Eukaryotic Cell?
Difference between Smooth Endoplasmic Reticulum and Rough Endoplasmic Reticulum
Function and structure of Mitochondria
Class 9 Science Chapterwise NCERT Solutions and Important notes of Science
Structure and Function of Cell : Cell Biology
What are Chromosomes, DNA and Genes?
Types of plant tissues : Class 9 CBSE Notes
Animal Tissues : Class 9 Science CBSE
What is the green house effect?
Class 10 Important Biology Notes
What is the importance of hormones?
Male and Female Reproductive System: Complete Anatomy for Grade 10 Students
The structure and anatomy of the Heart
Human digestive system structure and function
What is the difference between the homologous and analogous structure of organs
Modes of reproduction used by single organisms-Asexual reproductions
Anatomy of the Human brain-Class 10 CBSE
Ozone Layer and How it is Getting depleted.
Food chain and food web in an ecosystem
English Grammer
Antonyms and Synonyms Lists for The Preparation of CUET and other Entrance Exams
Download: Antonyms and Synonyms List
Direct and Indirect Narration rules Tenses wise and Sentences wise
Active Voice to Passive Voice Rules
Learn Tenses in English and translate Hindi sentences into English language
Download PDF-Learn Tenses in English and translate Hindi sentences into the English language
Download: PDFActive Voice to Passive Voice rules, tenses wise and sentences wise
