Flower
SEXUAL REPRODUCTION APOMIXIS
Anther Diploid Ovule
Pollen
Mother Cell
Megaspore
Mother Cell
Meiosis Meiosis
Haploid
Microspore
Haploid
Megaspore
Pollen Grain
Haploid
Embryo sac
Diploid
Embryo sac
Haploid
Sperm Cells
Haploid Egg
Diploid Cen. Cell
Double
Fertilization
Zygote (2n)
Primary Endosperm
Nucleus (3n)
Embryo
Endosperm
Plant
DIPLOSPORY
Failure of
Reduction
APOSPORY
Somatic Cell Acts
as a Spore
Diploid Egg
Parthenogenesis
ADVENTITIUOS
EMBRYONY
Somatic Cells Form
Embryo Directly
Diploid
Megaspore
SPOROPHYTIC
APOMIXIS
GAMETOPHYTIC
APOMIXIS
Figure 3. Comparison of Angiosperm Sexual Life Cycle with Apomictic Mechanisms