types of variation

Question 1

define variation

Answer 1

differences in characteristics between organisms

Question 2

define interspecific variation

Answer 2

variation between members of different species

Question 3

define intraspecific variation

Answer 3

variation between members within the same species

Question 4

name and describe 2 causes of variation

Answer 4

• an organism’s genetic material - differences in genetic material an organism inherits form parents - genetic variation
• environment - causes environmental variation

Question 5

state 5 causes of genetic variation between individuals within a population

Answer 5

• alleles
• mutations
• meiosis
• sexual reproduction
• chance

Question 6

describe how alleles cause genetic variation

Answer 6

genes have different alleles, individuals may inherit different alleles

Question 7

describe how mutations cause genetic variation

Answer 7

changes to DNA sequence can lead to change in proteins coded, if occurred in gamete it can be passed on

Question 8

describe how meiosis can cause genetic variation

Answer 8

independent assortment and crossing over leads to gametes showing variation

Question 9

describe how sexual reproduction can cause genetic variation

Answer 9

offspring inherits alleles from each parent - each individual is different to parent

Question 10

describe how chance can cause genetic variation

Answer 10

many different gametes produced from parental genome, result of chance which two combine so offspring differ from their siblings

Question 11

state 3 characteristics that are solely genetically-determined

Answer 11

blood group, hair colour, eye colour

Question 12

state 3 characteristics that are solely environmentally-determined

Answer 12

scars, hair length, muscle strength