4.7 Investigating Diversity

Question 1

What are the ways to compare genetic diversity

Answer 1

• Compare DNA base sequence
• Compare mRNA base sequence
• Compare amino-acid sequence of a protein
• Compare the frequency of measureable or observable characteristics - less accurate

Question 2

Which are the best three ways to investigate diversity

Answer 2

• Compare base sequence of DNA
• Compare base sequence of mRNA
• Compare amino-acid sequence of proteins

Question 3

What method would you use to compare genetic diveristy within a species and why

Answer 3

• Compare DNA base sequences
• To see minor variations

Question 4

What method would you use to investigate diversity between species and why

Answer 4

• Amino-acid sequence of proteins
• To reduce noise

Question 5

When comparing genetic diversity between species, what must be used to ensure comparison - give an example

Answer 5

• Genes/proteins must be present in all species of interest
• Respitory proteins allow comparions between kingdoms
• Haemoglobins would not

Question 6

What can be said about how closely related two organisms are from their base sequence

Answer 6

More differences in base sequence = more distantly related

Question 7

What can be said about how closely related two organisms are from their amino-acid sequence

Answer 7

• Less differences = closer related
• As similar DNA base sequences

Question 8

When given numerical data for investigating diversity, what must always be reffered to

Answer 8

Means and standard deviation

Question 9

If there is no overlap between the standard deviations of the mean of A and B, what can be said

Answer 9

There is likely to be a significant difference between A and B

Question 10

If there is an overlap between the standard deviations of the mean of A and B, what can be said

Answer 10

There is likely no significant difference between A and B