genetic diversity and adaption

Question 1

what’s the definition of population

Answer 1

group of organisms of one species living in a particular habitat at a particular time

Question 2

species

Answer 2

group of organisms that breed with eachother and produce fertile offspring

Question 3

what does genetic diversity lead to

Answer 3

more allleles in a population of species is beneficial as it gives the species a greater chance to survive a changing environment

Question 4

what reduces genetic diversity

Answer 4

genetic bottleneck
-random event which causes a reduction in population
- large number of population die before reproducing
- this reduces the gene pool alleles
- smaller individuals remain with a smaller genetic diversity

founder affect
-a few organisms from start to
- new population have less variety of alleles in initial gene pool
- new individuals refocused together to establish large population

Question 5

what increases genetic diversity

Answer 5

migration
mutation
natural selection
large population size

Question 6

natural selection

Answer 6

change in the allele frequency in a population where an advantage allele increases leading population to become better adapted to survive
MARIA
mutation
which creates a different version of the gene called an allele
advantage and survivable
reproduction
change in allele frequency

Question 7

what’s directional and stabilising selection

Answer 7

directional - one extreme which are more likely to survive and reproduce
stabilising - middle range are more likely to survive and reproduce

Question 8

what adaptions do natural selection result in species

Answer 8

anatomical - structural features
physiological - within organism eg venom production
behavioural adaptations - the way an organism acts

Question 9

what’s selection pressure

Answer 9

Selection pressures are environmental factors that make some traits more or less advantageous for survival and reproduction within a population.