Variation
Differences shown by organisms within the same species
Types of variation
Continuous and Discontinuous
Continuous Variation graph
Histogram
discontinuous variation graph
Bar graph
continuous variation
Variation that can take any range and has intermidiates in phenotypes
discontinuous variation
It is determined by genes only and has no intermidiates
variation leads to
Evolution of a new organism or species
mutation
A sudden or spontaneous changes happening to the genetic makeup of an organisms
mutation leads to
origin of a new organism
types of mutation
genetic and chromosomal
example of a mutation for blood called
Sickle-cell anaemia
advantage of sickle cell anaemia
Can never suffer from malaria
what causes mutation
Radiation and chemicals
adaptive feature
An inherited feature that helps you to survive and reproduce
Natural selection
Genetic variation within a population
artificial selection
choosing the advantageous alleles
what traits do selective breeding in crops prefer
drought resistant, pest resistant, traits that encourage growth
what traits do selective breeding in animals prefer
high milk yield, good quality meat