Variation Flashcards
Continuous and Discontinuous Variation
1
Q
Variation is the
A
Difference between species due to genes/environment
2
Q
Continuous Variation
A
Measurable (has values)
Caused by both genes and environment
Diagram: line/bar graph
Ex. height, age and mass
3
Q
Discontinuous Variation
A
Unmeasureable (has no value)
Caused by genes
Diagram: pie chart
Ex. eye color, blood type and presence/absence of horns in a cattle
4
Q
Causes of Genetic Variation
A
Mutation and Mutagens
5
Q
Mutation is
A
A random change in a gene which can produce new alleles and involves a change in the base sequence in DNA
6
Q
Mutagens is
A
Chemicals which can cause mutations
Ex. X-rays, gamma radiation, beta radiation, alpha radiation, meiosis, random mating and random fertilization
