Reproduction in flowering plants
Similarities and differences between asexual & sexual reproduction: TB pg 57
Characteristic Asexual reproduction Sexual reproduction
number of parents 1 2, with two genders
how many stages/processes 1= mitosis 2= meiosis +
fertilisation
gamete formation no gamete formation gamete formation
genetic variation of offspring genetically identical; no genetic variation to
variation parent
rate of reproduction faster slower
energy input less energy input more energy input
outside agents (eg pollinators) no pollinators pollinators
ability to adapt to a changing environment not possible possible
possibilty of evolution low – no genotype Good – genotype
variation variation
Asexual reproduction = 1. does not involve sex cells/ fertilisation 2. only 1 parent plant
Advantages Disadvantages
offspring have no variation; genetically identical unable to adapt; environmental changes –
leads to extinction
all individuals produce offspring; no energy overcrowding + excessive competition for
expenditure depleting resources
simple + fast process
favourable mutations spread rapidly
Sexual reproduction = 1. involves sex cells + fertilisation 2. involves genetic material of 2
parents
Advantages Disadvantages
offspring have variation; not genetically high energy expenditure; in sex organs,
identical gametes, mate
better chance of survival in changing slower reproduction process + need outside
Similarities and differences between asexual & sexual reproduction: TB pg 57
Characteristic Asexual reproduction Sexual reproduction
number of parents 1 2, with two genders
how many stages/processes 1= mitosis 2= meiosis +
fertilisation
gamete formation no gamete formation gamete formation
genetic variation of offspring genetically identical; no genetic variation to
variation parent
rate of reproduction faster slower
energy input less energy input more energy input
outside agents (eg pollinators) no pollinators pollinators
ability to adapt to a changing environment not possible possible
possibilty of evolution low – no genotype Good – genotype
variation variation
Asexual reproduction = 1. does not involve sex cells/ fertilisation 2. only 1 parent plant
Advantages Disadvantages
offspring have no variation; genetically identical unable to adapt; environmental changes –
leads to extinction
all individuals produce offspring; no energy overcrowding + excessive competition for
expenditure depleting resources
simple + fast process
favourable mutations spread rapidly
Sexual reproduction = 1. involves sex cells + fertilisation 2. involves genetic material of 2
parents
Advantages Disadvantages
offspring have variation; not genetically high energy expenditure; in sex organs,
identical gametes, mate
better chance of survival in changing slower reproduction process + need outside
