Variation

Question 1

Two types of variation

Answer 1

Discrete and continuous

Question 2

Discrete variation

Answer 2

Discrete variation – can be divided up into distinct groups and is normally controlled by a single gene.
For example – pea seed colour Or ability to roll tong

Question 3

Continuous variation

Answer 3

Continuous variation - does not fall into distinct groups but flows from one extreme to the other and is controlled by alleles from more than one gene (polygenic inheritance).
E.g. weight, height, marbling on lean meats

Question 4

Environmental influences - discrete

Answer 4

Largely unaffected by environmental factors

Question 5

Environmental influences- continuous

Answer 5

Influenced by environment