Variation

Question 1

Variation is the

Answer 1

Difference between species due to genes/environment

Question 2

Continuous Variation

Answer 2

Measurable (has values)

Caused by both genes and environment

Diagram: line/bar graph

Ex. height, age and mass

Question 3

Discontinuous Variation

Answer 3

Unmeasureable (has no value)

Caused by genes

Diagram: pie chart

Ex. eye color, blood type and presence/absence of horns in a cattle

Question 4

Causes of Genetic Variation

Answer 4

Mutation and Mutagens

Question 5

Mutation is

Answer 5

A random change in a gene which can produce new alleles and involves a change in the base sequence in DNA

Question 6

Mutagens is

Answer 6

Chemicals which can cause mutations

Ex. X-rays, gamma radiation, beta radiation, alpha radiation, meiosis, random mating and random fertilization