Unit 4 - Investigating diversity

Question 1

What can genetic diverity between species be compared with?

Answer 1

• The base sequence of DNA
• The base sequence of mRNA
• Amino acid squence

Question 2

How do you compare amino acids sequences?

Answer 2

• The sequence of amino aicds in protein is coded for by the base sequence of DNA.
• Related organisms have smilar DNA sequences.

Question 3

Investigating diversity- immunulogical similarities

Answer 3

Similar protein will also bind to the same antibodies.

Question 4

How has the way genetic diversity assessed changed?

Answer 4

Early estimates of genetic diversity were made by looking at the frequency of measurbale or observable charactersitics. E.g. eyecolour
However now technology has allowed us to measure genetic diversity directly. This gives to more accurate estimates of genetic diversity.

Question 5

What is variation?

Answer 5

Variation is the differences that exist between individuals.

Question 6

What can variation be caused by?

Answer 6

• Environment e.g. climate, food and lifestyle
• Genetic factors e.g. Different species have different genes

Question 7

How to make sure the sample is random?

Answer 7

• Pick random sample sies by divdiing the field into a grid. Use a random number generator.
• Analyse the results statistically. This allowed you see to whether the results are ue to chance.

Question 8

Equation for mean

Answer 8

Mean = total of all the values in your data/ the number of value in your data

Question 9

Standard deviation tell you about variation within a sample?

Answer 9

The standard deviation tells you how much the values in a single sample vary. It is a measure of the spread of values about the mean.

A large SD means the data varies a lot
A small SD means all the data is similar.

The longer the bar, the larger the standard deviation adn more spread out the sample data is from the mean.