Essay Topics
Types of Essays
Essay Checklist
Word Counter
Readability Score
Essay Rewriter
The term mutation was first coined by Hugo devries in the early 1900 to designate sudden and drastic changes that occurred in plants. Devries conducting breeding experiments on the plant Oenothera lamarckiana (Of the family Onagraceae) commonly called the Evening primrose. He noticed that some of the progeny possessed characters which were not to be found in either of the parental types. He further observed these changed types bred true. He therefore described these sudden changes as mutations and ascribed them to some changes occurring in the germ plasma of parents. Even Charles Darwin was aware of mutations, even though he did not use the term (mutations). He was aware of sudden changes occurring in organisms both plants and animals and had used the term sports, to describe them. The first recorded instance of mutation dates back to 1791, to the pen of Seth Wright, a New England farmer, where appeared a male lamb with short bowed legs. Wright reared this lamb and it bred true. A lamb with short legs was of great advantage as it could not jump even a low level fence. This short legged breed was called Ancon breed. This breed however became extinct after about eight years. But the same Ancon sheep appeared some fifty years later in the flock of a Norwegian farmer, representing probably the repetition of the same mutation. Since then a number of mutant types have been discovered. Hornless individuals in cattle, double toed cats, albino rats, mule footed swine, dwarf cupid sweet pea, double flowered, white flowered varieties of many plants are all mutants. The scientific study of mutations began with the work of Morgan on Drosophila in 1910. He observed that among a population of red eyed flies, some individuals with white eye appeared and they were predominant among the male individuals. He further found out that the white eyed gene is recessive to red eye and located on the X chromosome. Since the male individuals possessed only one X chromosome and the females had two X chromosomes, the recessive character appeared more frequently among males than among females. After the original discovery of the white eyed mutant in Drosophila by Morgan and his co-workers, a detailed analysis of millions of these fruit flies for over 1-7 years was carried out by different geneticists and nearly 500 gene mutations have been discovered. Simultaneously other organisms like maize, rodents, pea, snap dragons, poultry, man etc. also have been investigated and scores of mutations have been discovered. Even in microorganisms also mutations have been detected.
Essay Writing Checklist
The following guidelines are designed to give students a checklist to use, whether they are revising individually or as part of a peer review team.
Introduction
  • Is the main idea (i.e., the writer's opinion of the story title) stated clearly?
  • Is the introductory paragraph interesting? Does it make the reader want to keep on reading?
Body Paragraph
  • Does each body paragraph have a clear topic sentence that is related to the main idea of the essay?
  • Does each body paragraph include specific information from the text(including quoted evidence from the text, if required by the instructor)that supports the topic sentence?
  • Is there a clear plan for the order of the body paragraphs (i.e., order of importance, chronology in the story, etc.)?
  • Does each body paragraph transition smoothly to the next?
Conclusion
  • Is the main idea of the essay restated in different words?
  • Are the supporting ideas summarized succinctly and clearly?
  • Is the concluding paragraph interesting? Does it leave an impression on the reader?
Overall Essay
  • Is any important material left unsaid?
  • Is any material repetitious and unnecessary?
  • Has the writer tried to incorporate "voice" in the essay so that it has his/her distinctive mark?
  • Are there changes needed in word choice, sentence length and structure, etc.?
  • Are the quotations (if required) properly cited?
  • Has the essay been proofread for spelling, punctuation, grammar, etc.?
  • Does the essay have an interesting and appropriate title?
Essay on Mutation
Trending Essay Topics
Explore today's trending essay topics:
Reference
Feel free to use content on this page for your website, blog or paper we only ask that you reference content back to us. Use the following code to link this page:
Terms · Privacy · Contact
Essay Topics © 2019

Essay On Mutation

Words: 420    Pages: 2    Paragraphs: 12    Sentences: 24    Read Time: 01:31
Highlight Text to add correction. Use an editor to spell check essay.
              The term mutation was first coined by Hugo devries in the early 1900 to designate sudden and drastic changes that occurred in plants.
             
              Devries conducting breeding experiments on the plant Oenothera lamarckiana (Of the family Onagraceae) commonly called the Evening primrose.
             
              He noticed that some of the progeny possessed characters which were not to be found in either of the parental types. He further observed these changed types bred true.
             
              He therefore described these sudden changes as mutations and ascribed them to some changes occurring in the germ plasma of parents.
             
              Even Charles Darwin was aware of mutations, even though he did not use the term (mutations). He was aware of sudden changes occurring in organisms both plants and animals and had used the term sports, to describe them.
             
              The first recorded instance of mutation dates back to 1791, to the pen of Seth Wright, a New England farmer, where appeared a male lamb with short bowed legs. Wright reared this lamb and it bred true.
             
              A lamb with short legs was of great advantage as it could not jump even a low level fence. This short legged breed was called Ancon breed. This breed however became extinct after about eight years.
             
              But the same Ancon sheep appeared some fifty years later in the flock of a Norwegian farmer, representing probably the repetition of the same mutation. Since then a number of mutant types have been discovered.
             
              Hornless individuals in cattle, double toed cats, albino rats, mule footed swine, dwarf cupid sweet pea, double flowered, white flowered varieties of many plants are all mutants. The scientific study of mutations began with the work of Morgan on Drosophila in 1910.
             
              He observed that among a population of red eyed flies, some individuals with white eye appeared and they were predominant among the male individuals.
             
              He further found out that the white eyed gene is recessive to red eye and located on the X chromosome.
             
              Since the male individuals possessed only one X chromosome and the females had two X chromosomes, the recessive character appeared more frequently among males than among females.
             
              After the original discovery of the white eyed mutant in Drosophila by Morgan and his co-workers, a detailed analysis of millions of these fruit flies for over 1-7 years was carried out by different geneticists and nearly 500 gene mutations have been discovered.
             
              Simultaneously other organisms like maize, rodents, pea, snap dragons, poultry, man etc. also have been investigated and scores of mutations have been discovered. Even in microorganisms also mutations have been detected.
Science Essay Biology Essay 
Tip: Use our Essay Rewriter to rewrite this essay and remove plagiarism.

Add Notes

Have suggestions, comments or ideas? Please share below. Don't forget to tag a friend or classmate.
clear
Formatting Help
Submit
SitemapVirtual DJ Professionnel | The Office | La Grande Muraille TRUEFRENCH HDTS MD 2017