Male reproductive organ in flowering plant is _______
Stamens
Stamens is made up of
an ______ (a male cone) and
a ________ (a long stalk)
Stamens is made up of
an anther (a male cone) and
a filament (a long stalk)
1 anther usually contain 4 ______________ / pollen sacs
1 anther usually contain 4 microsporangia / pollen sacs
Microsporangia is a plural term for _______________
Microsporangia is a plural term for microsporangium
Microsporangium /
pollen sac
One of the chambers of an anther in which pollen grain is produced
Microsporocyte /
microspore mother cell
A diploid cell in microsporangium
that divide by meiosis to
give rise to 4 haploid microspores (tetrad)
Microsporocyte / microspore mother cell (2n) undergo meiosis to produce microspore (n)
Microsporocyte / microspore mother cell (2n) undergo meiosis to produce four microspores / tetrad (n)
Define tetrad
A group of 4 haploid microspores (immature pollen grain) produced at the end of the second meiotic division
Microspores (tetrad)
A small haploid spore from a heterosporous plant species that develops into pollen grain / male gametophyte
Male gametophyte in flowering plant is
pollen grain
Each microspores divide once by mitosis to form pollen grain.
Pollen grain contain 2 cells:
generative cell
tube cell
Each microspores divide once by mitosis to form pollen grain.
Pollen grain contain 2 cells:
generative cell
tube cell
Generative cell / generative nucleus
Generative cell will divide by mitosis to form 2 non-motile sperm cells
Tube cell / tube nucleus
Tube cell will produce pollen tube. Pollen tube will deliver sperms to the egg.
Pollen grain becomes mature after ___________
Pollen grain becomes mature after pollination
Pollination is
Pollination is transfer of pollen grain from the anther to a stigma
What happened to pollen when it landed on stigma?
- Tube nucleus will produce pollen tube
- Generative nucleus divide once by mitosis to produce 2 sperm nuclei (male gametes)
- Pollen tube will deliver sperms to the egg.