Flower: a specialized shoot with 4 whorls of modified leaves sepals (calyx) petals (corolla) stamen (filament + anther) pistil (stigma + style + ovary) sterile Dimorphic gender expression the presence of two sexual mating types in populations Cosexual gender expression combine both gender functions within individuals Monomorphic the presence of a single sexual mating type in a population H ca. 10% of all angiosperm species F M H F M H M F H H F M
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Flower: a specialized shoot with 4 whorls of modified leaves · Flower: a specialized shoot with 4 whorls of modified leaves sepals (calyx) petals (corolla) stamen (filament + anther)
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Flower: a specialized shoot with 4 whorls of modified leaves
sepals (calyx)
petals (corolla)
stamen (filament + anther)
pistil (stigma + style + ovary)
sterile
Dimorphic gender expression
the presence of two sexual
mating types in populations
Cosexual gender expression
combine both gender functions
within individuals
Monomorphic
the presence of a single sexual
mating type in a population
H
ca. 10% of all
angiosperm species
F
M
H
F
M
H
M
F
H
H
F
M
F
M
F
M
F H
Male-sterility
mutation
Female-sterility
mutation
•! Modular construction & the “packaging” of gender