Date palm : Date palm Dioecious plants
Marchantia : Marchantia Dioecious plants Female Male
SELF FERTILIZATION (ENDOGAMY) : SELF FERTILIZATION (ENDOGAMY) Fusion of gametes from the SAME individual
Shown in BISEXUALS, ie, reproductive structures in the same plant/animal.
Also called HOMOTHALLIC or MONOECIOUS individuals or condition.
SELF FERTILIZATION : SELF FERTILIZATION Examples…..
Fungi ,Plants (Zea mays, Cucurbitaceae , Morus alba)
Animals (Earthworms, Leech, Hydra, Sponges, Tapeworms)
They are also called HERMOPHRODITES.
Self fertilization : Self fertilization
Self fertilization occurs in Zea mays : Self fertilization occurs in Zea mays
Charaabisexual plant(Lower) : Charaabisexual plant(Lower)
Slide 8 : Chara
Hydra : Hydra
Some organisms are hermaphroditesThey produce both eggs and sperm & can self-fertilize : Some organisms are hermaphroditesThey produce both eggs and sperm & can self-fertilize Eg. Tapeworm
Tapeworm…. a hermophrodite : Tapeworm…. a hermophrodite
Leech & Earthworm….are hermophrodites : Leech & Earthworm….are hermophrodites
Some hermaphrodites cannot self-fertilize and so must exchange sperm to fertilize each other’s eggs : Some hermaphrodites cannot self-fertilize and so must exchange sperm to fertilize each other’s eggs E.g., some snails
UNISEXUALS… Male and females differ : UNISEXUALS… Male and females differ
Female : Female Male
Female and male reproductive structures of cockroach : Female and male reproductive structures of cockroach
Human life cycle : Human life cycle
Cell division during Gamete formation : Cell division during Gamete formation DIPLOID BODY
Pteridophytes
Gymnosperms Plantae
Angiosperms
Most animals … Animalia
Slide 19 :
Diploid body : Diploid body
HAPLOID BODY : HAPLOID BODY Monera
Fungi
Algae
Bryophytes
They produce gametes by MITOSIS
Does this mean that meiosis never occurs in organisms that are Haploid ? : Does this mean that meiosis never occurs in organisms that are Haploid ? Meiosis does occur
Whenever there is mating (fertilization) meiosis has to occur. NO
Haploid adults of green alga : Haploid adults of green alga
DIPLOID BODY in PLANTS : DIPLOID BODY in PLANTS
GAMETIC MEIOSIS : GAMETIC MEIOSIS Meiosis produces gametes
Eg. Animalia
Gameticmeiosis : Gameticmeiosis
SPORIC MEIOSIS : SPORIC MEIOSIS Meiosis produces spores
Eg. Plantae
Sporic meiosis : Sporic meiosis
ZYGOTIC MEIOSIS : ZYGOTIC MEIOSIS Zygote undergoes meiosis
Eg. Protista
Fungi
Zygotic meisis in green alga, Chlamydomonas : Zygotic meisis in green alga, Chlamydomonas
Gametic Transfer : Gametic Transfer Motile Male gamete
Non motile female gamete
Motile male gamete
Motile female gamete Most Organisms Fungi
Algae
Medium of gamete transfer : Medium of gamete transfer WATER
Male gamete need water
Eg. Algae
Bryophytes
Peridophytes
Corals
Fishes
frogs