Statistics and Maths Flashcards
When can Chi Squared be used?
When testing the number of individuals in particular categories (frequencies) and whether this fits our expectations It is used for genetic crosses, choice chamber experiments etc.
When can the T test be used?
Uses measurements Investigation is looking for a difference between measurements of the same variable from different samples.
When can Spearman’s rank be used?
Used to test for a correlation between any two biological measurements of the different variable of the same sample.
What is the equation we use to calculate the standard deviation?
WHat is the p value?
The probability value, the probability of the results in the test being due to chance
What does the equation for the t test look like?
What do the figures mean?
What does the equation for Chi Squared look like?
What does the equation for Spearman’s rank look like?
How do we calculate the measure of uncertainty?
Plus or minus half the scale division. For a thermometer with a mark at every 1.0°C, the uncertainty is ± 0.5°C.
WHat is the difference between the roles of DNA and RNA in all living organsisms?
In all living cells, DNA holds genetic information and RNA transfers genetic information from DNA to the ribosomes.
Who worked out the structure of DNA?
What were the two models they suggested for DNA replication?
Watson and Crick
Conservative and semi-conservative
What was Watson and Crick’s idea of conservative replication?
What was Watson and Crick’s idea of conservative replication?
The original DNA molecule remains intact while a seperate DNA copy is built up from new nucleotides.
The original DNA is split into two seperate strands, which is then replicate using free nucelotides.
