EASY BOTANY TASTY BOTANY -a magic botanical touch
REPRODUCTION IN ORGANISMS part 3 prefertilisation
events of sexual reproduction prior to fuion of gametes, includes gametogenesis and gamete transfer.
GAMETOGENESIS- process of formation of haploid male and female gametes.
HOMOGAMETES-gametes simillar in appearance.
HETEROGAMETES- gametes dissimilar in appearance .(male- antherozoid /sperm;female egg /ovum)
BISEXUAL,/ MONOECIUS /HOMOTHALLIC /
HERMAPHRODITE (ANIMALS like earth worm ,leech ,tape worm , sponge )male and female reproductive strucures on same organism.eg cucurbits ,coconut .
UNISEXUAL/DIOECIUS / HETROTHALLIC . male and female reproductive structures on Different organisms. eg papaya, date palm , marchantia , cockroach .
unisexual male flower - staminate , unisexual female flower - pistillate
CELL DIVISION DURING GAMETE FORMATION
gametes are haploid in haploid plants (algae , fungi, bryophytes) gametes produced by MITOSSIS.
in diploid organisms specialised cells known as meiocytes or gamete mother are produced which undergoes MEIOSIS and produces haploid gametes.
REPRODUCTION IN ORGANISMS part 3 prefertilisation
events of sexual reproduction prior to fuion of gametes, includes gametogenesis and gamete transfer.
GAMETOGENESIS- process of formation of haploid male and female gametes.
HOMOGAMETES-gametes simillar in appearance.
HETEROGAMETES- gametes dissimilar in appearance .(male- antherozoid /sperm;female egg /ovum)
BISEXUAL,/ MONOECIUS /HOMOTHALLIC /
HERMAPHRODITE (ANIMALS like earth worm ,leech ,tape worm , sponge )male and female reproductive strucures on same organism.eg cucurbits ,coconut .
UNISEXUAL/DIOECIUS / HETROTHALLIC . male and female reproductive structures on Different organisms. eg papaya, date palm , marchantia , cockroach .
unisexual male flower - staminate , unisexual female flower - pistillate
CELL DIVISION DURING GAMETE FORMATION
gametes are haploid in haploid plants (algae , fungi, bryophytes) gametes produced by MITOSSIS.
in diploid organisms specialised cells known as meiocytes or gamete mother are produced which undergoes MEIOSIS and produces haploid gametes.
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