Descriptive statistics

  Below you will find a file with the concepts of descriptive statistics. Descriptive statistics are numbers that are used to summarize and describe data. The word “data” refers to the information that has been collected from an experiment, a survey, a historical record, etc. If we are analyzing birth certificates, for example, a descriptive statistic might be the percentage …

Normal distribution

The figure above shows a graph that is known as the “bell-shaped” or Gaussian curve. It represents a “normal” distribution of a quantitatively variable character, which might concern height in men, or the level of resistance in plants. This variable is represented on the horizontal axis of the graph, and it ranges from the minimum to the maximum. The percentage …

Genetics problems with answers

Below you can find a great deal of diverse genetics problems with answers. Try to solve as many as you can and do not give up if something does not turn out right. Should you have any questions, do not hesitate to leave a comment. Big thanks to http://www.docstoc.com/docs/41377584/GENETICS-PROBLEMS-WITH-ANSWERS.

Gene linkage and genetic mapping

Here you will find some good stuff about gene linkage and genetic mapping. Take a careful look at how genetic maps are made as well as practice genetics problems at the end.   A very useful tutorial of genetic linkage and mapping here: Below you will find practice problems with answers More practice will never do you bad: As previously …

Bacterial count

Today it’s time to learn about bacterial counts. Amazing tutorial can be found here and I compiled that information into a slide show: You can also find an amazing tutorial here. Below you find lab report from microbiology laboratory. Another one is beneath, too: One slideshow: Finally, a good slideshow should consolidate your knowledge: Big thanks to http://www2.fiu.edu/~makemson/Growth.pdf, http://www2.fiu.edu/~makemson/Growth.pdf and …

Using logarithmic graph paper

During my preparation for the IBO, a few times I encountered problems with graphs depicted on logarithmic or semi-logarithmic paper. Thus, I share with you a tutorial how to use this paper. Keep checking this or any other of my posts because they are constantly updated with new information. Some good practical examples of log graphs: Big thanks to http://www.lhup.edu/~dsimanek/scenario/errorman/graphs2.htm.

Antibiotic Sensitivity

In this section you fill find out about antibiotic sensitivity in bacterial cultures. Y  

Dilutions

  Today I would like to introduce a very important point in practical part of biology olympiad. In various experiments you need to make dilutions in order to get results. So if you want to understand and learn how to make either simple or serial dilutions, read carefully the documents below. Good luck!       Also, a good tutorial …