• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Summarize the aspects of Mendel(TM)s work that suggests his results stood a good chance of being accurate and valid.

Extracts from this document...

Introduction

Summarize the aspects of Mendel's work that suggests his results stood a good chance of being accurate and valid. Gregor Mendel was an Austrian priest and scientist, whom is widely known as the 'father of genetics' for his study of inheritance in pea plants. Mendel spent a vast amount of his life planting pea plants, which came to his discovery of the major foundation of genetics as a science. In his experiment, he used an organism plant which was a common garden pea which has a flower that lends itself to self- pollination. The male parts of the flower are termed as anthers and produce pollen which contains the male gametes (sperm). While female parts of the flower are the stigma, style and ovary. The female gamete is produced in the ovary. During the process of pollination (the transfer of pollen from anther to stigma), the pollen grain grows a pollen tube in which allows the sperm to travel though the stigma and style, eventually reaching the ovary. ...read more.

Middle

4. Males and females contribute equally to the traits in their offspring. 5. Acquired traits are not inherited. The information that he collected was all due to what he witnessed from him pea plants. At first, Mendel studied the inheritance of the pea's seed shape first. Mendel crossed pure- breeding smooth seeded plants with a variety which had always produced wrinkled seeds. When he found out the results, all the seeds were smooth. The following year, Mendel planted these seeds and allowed then to self fertilize, without him doing anything, such as cross breeding. The pea plant produced 7,324 seeds, in which 5,574 were smooth and 1,850 were wrinkled. In order to help with record keeping of the plants, the generations were labelled and numbered. The parental generation was named P1, while the offspring of the P1 generations are the F1 generation (first filial). When the self- fertilizing F1 generation produced peas, they were called the F2 generation. Mendel studied seven traits which appeared in two forms, rather than continuous characters which are difficult to find out. ...read more.

Conclusion

The trait not shown in the F1 reappeared in the F2 in about 25% of the offspring. 4. Traits remained unchanged when passed to offspring: they did not blend in any offspring but behaved as separate units. 5. Reciprocal crosses showed each parent made an equal contribution to the offspring. Mendel's Conclusions: 1. Evidence indicated factors could be hidden or unexpressed, these are the recessive traits. 2. The term phenotype refers to the outward appearance of a trait, while the term genotype is used for the genetic makeup of an organism. 3. Male and female contributed equally to the offspring's' genetic makeup: therefore the number of traits was probably two. 4. Upper case letters are traditionally used to denote dominant traits, lower case letters for recessives. The reason why Mendel's experiment is completely valid and accurate is because he used variety in order to find out the conclusion. For example, he used many pea plant varieties instead of just one. He also used selective breeding and natural breeding for the plants to show different types of genetic varieties. In addition, the breeding occurred during a very long period of time which helped to make his conclusion concrete and secure. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Genetics, Evolution & Biodiversity section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Genetics, Evolution & Biodiversity essays

  1. dna extraction from peas

    of the way for a clear fire exit, and to prevent falling over them, etc. Spillages and breakages Ensure that all spillages and breakages are reported, in order for them to be taken care of correctly and safely.

  2. Investigate how the height to width ratio of Limpets varies with distance from sea

    Repeats were taken once and when analysing both sets of data, it was evident that they both indicated the same trend. My satitistical test and line graph were both produced using an average from both origional and repeated data. After conducting the Spearmans Rank Correlation Coefficient, I was made aware

  1. Colour variation in Littorina littoralis on the upper, middle and lower zones of a ...

    The investigation will start when the tide has retreated and will be finished before it comes back in Collecting tray Using a different tray may provide a different colour comparison. A white tray will be used because it provides a neutral background to compare colours with.

  2. Investigating the colour variation of Littorina littoralis and their abundance across the upper, middle ...

    involved the handling of organisms, and therefore the temporarily removing them from their natural habitat. To ensure their wellbeing, they were all unharmed and handled with care.

  1. Gregor Mendel and his work

    His second step was when he cross polinated two different varities of the P gerenation that had distinct features. The offspring was named the F1 generation (F for filial, meaning brothers and sisters). The third step involed the F1 generation self pollinating and the offspring were named the F2 generation.

  2. Issue Report on Captive Breeding and Reintroduction

    The Common Dormouse Captive Breeders Group (CDCBG) chooses which individuals breed and how many are bred annually, which also helps to prevent inbreeding. The Paignton zoo studbook keeper gives each captive born dormouse a stud book number, and their breeder will allocate each mouse a local ID number.

  1. Captive Breeding

    In Nigeria, its involved in environmental education and conservation since 1993.the Omo Forest reserve is one of the few tropical forest left in Nigeria .research have conformed that African forest elephants ,chimpanzees and white-throated guenon monkeys live in Omo forest, all of which are endangered.

  2. Management style, culture & organizational structure.

    The foreign DNA anneals with the plasmid and is joined covalently by DNA ligase to form a hybrid vector (in other words a mixture or hybrid of bacterial and foreign DNA). Several other products are also formed: some plasmids will simply re-anneal with themselves to re-form the original plasmid, and

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work