variation

Question 1

define continuous variation

Answer 1

• variation where there are 2 extremes and a full range of values in between

Question 2

define discontinuous variation

Answer 2

• where there are distinct categories and nothing in between

Question 3

define environmental variation

Answer 3

• variation caused by response to environmental factors such as light intensity

Question 4

genetic variation

Answer 4

• variation caused by possessing a different combination of alleles

Question 5

intraspecific variation

Answer 5

• differences between members of the SAME species

Question 6

define interspecific variation

Answer 6

• differences between different species

Question 7

define variation

Answer 7

• the presence of variety - the differences between individuals

Question 8

how do identical twins develop and evolve ?

Answer 8

• identical twins start as one cell that divides + then separates into 2 cells
• each of these 2 cells —> develop into a separate person
• both have the same genetic information
• replication of DNA and cell divisions many have introduced changes to the DNA
• slight environment in the womb r after birth can mean that 2 individuals show physical differences

Question 9

give a brief summary of how variation occurs ?

Answer 9

• mutations occur randomly causing genetic variation
• variation may exist for many generations before selection occurs
• when the environment changes

Question 10

what is examples of intraspecific variation ?

Answer 10

• eye colour , hair colour , skin colour and nose shape

Question 11

the greater the genetic diversity of a species ….

Answer 11

• the greater the intraspecific variation

Question 12

what is variation used for ?

Answer 12

• to separate members of one species from another