# 3.4.7 Investigating diversity Flashcards

Comparing the base sequences of a gene provides more information than comparing the amino acid sequence for which the gene codes. Explain why

Different base triplets code for the same amino acids

What does standard deviation show?

Shows the spread of data about the mean

What can be said about the data collected if the standard deviation is large?

less reliable (data varies a lot)

What can be said about the data collected if the standard deviation is small?

more reliable (data varies very little)

If the standard deviations of the 2 sets of data collected overlaps what can be concluded?

no difference in the 2 sets of data, its not significant - due to chance

Variation is….

the differences between individuals

variation is caused by

genetics and the environment (or both)

Variation between organisms of the same species is due to …

differences in their alleles (and the environment)

variation between organisms of different species is due to…

different genes (and the environment)

When studying variation - can you study the whole population?

NO - take a sample

When you sample to study variation, how should you go about collecting the sample?

randomly

Taking samples at random ensures…

results are not biased

results are representative

When studying variation between 2 populations, what would you calculate?

mean

standard deviation

When plotting variation data, what type of graph do you get?

normal distribution curve

The highest point on a normal distribution curve (that is symmetrical) is ..

the mean value