Whole Topic Flashcards
How many genes control continuous and discontinuous variation?
Continuous - many
Discontinuous - one/few
Does environmental factors have an effect of continuous or discontinuous variation?
Continuous (some)
Is continuous heritable or non-heritable?
Both
Is discontinuous heritable or non-heritable?
Heritable
What is inter-specific competition?
Competition between different species of the same resources
What is intra-specific competition?
Competition between the same species (same animal for same food)
What are the factors that exert selective pressures and what does this increase?
Competition, environmental and human factors place selective pressures, increasing chances of some phenotypes
What are some selective agencies and what do they do?
Predation - more population, more prey for predators
Human impact - habitat loss destroyed breeding grounds
Temperature - provide correct environment
What is a gene pool?
Total number of all alleles for all the genes in a population
What is the allele frequency?
Its proportion/percentage of all alleles of that gene in a gene pool
What is genetic drift?
Chance variation in the allele frequency in a population
What is bottleneck example?
Where a disaster occurs, division in a population
What is the founder effect?
When they colonise a new space?
Is genetic drift more significant for larger or smaller populations?
Smaller/isolated populations
What does their Hardy-Weinberg principle state?
The frequency of dominant, recessive and genotype will remain constant from one generation to the next if conditions are kept the same
