natural selection

Question 1

whats discontinued variation

Answer 1

a trait with distinct categories and no values between these categories, caused by a very small amount of dna (eye colour)

Question 2

whats continued variation

Answer 2

characteristics vary between 3 extremes, no distinct categories, due to a larger amount of genes (height)

Question 3

what is variation mostly impacted by

Answer 3

the environment

Question 4

who first suggested the theory of natural selection

Answer 4

Darwin

Question 5

what is the theory of natural selection

Answer 5

organisms are genetically adapted to their environment. This mean some organisms in a varied population have a trait or difference that means they have a greater chance of survival and therefore reproduction to pass down those advantageous genes

Question 6

what does natural selection operate through

Answer 6

making distinctions between phenotypes in a population

Question 7

what are selective pressures

Answer 7

an environmental factor that makes individuals with certain traits more likely to survive, this ultimately will change the genetic makeup (alleles) of the population over time

Question 8

what does the hardy - weinberg equilibrium state

Answer 8

“the frequency of alleles in a population will remain fairly constant if:​ the population is large, ​randomly breeding and ​not subject to mutation, migration or selection”

Question 9

what is the hardy - weinberg equation

Answer 9

p2 + 2pq + q2 = 100% or 1

if the population is in equilibrium: p2 = the dominant homozygous, p2 = the recessive homozygous, 2pq = the heterozygous.

Question 10

what does the equation state

Answer 10

both allele and genotype frequencies remain constant meaning they are in equilibrium.