GAMETOGENESIS Flashcards
PROCESS OF DEVELOPMENT AND MATURATION OF SEX CELL GAMETES
GAMETOGENESIS
MATUYRE REPRODUCTIVE CELLS CAPABLE OF FERTILIZATION
GAMETES
GIVE ME 3 OF THE FUNCTION OF GAMETOGENESIS?
1.TO SURVIVE in environment quiet different from the gonad
2. TO RECOGNIZE homologous celss of other gender and participate in event related to fertilization
3. TO PROVIDE sufficient genetic and cytoplasmic materials to support development of a new organism
duration of maturation in female
BEFORE BIRTH - SEXUAL MATURITY- LOSS OF FERTILITY
duration of maturation in male
FROM BIRTH - SEXUAL MATURITY - DEATH
in spermatogenesis the nucleus of spermatids become the?
HEAD
the golgi becomes the ?
ACROSOME
cytoplasm becomes the?
enevlope surrounding the head, middle piece and tail
mitochondria becomes the?
spiral filament in the middle piece
Centrosome becomes the?
motile or sperm tail
transformation of spermatids to spermatozoa is embedded in the cytoplasm of ?
SERTOLI CELLS in the testes
inside this tubules is where the sperm cells are actually form through.
SEMINIFEROUS TUBULES
In spermatogenesis and oogenesis premordial germ cells Q1.migrate to? and Q2. is ?
A1. Embryonic gonad
A2. WITHOUT sex or indifferent stage
in spermatogenesis this stages is in sexual differentiation, WHICH undergo mitosis many times to produce daughter spermatogonia.
SPERMATOGONIA
in this stage it enter 1st phase or (meiosis 1), also known as reduction division, increased production of testosterone
daughter spermatogonia
in this stage the first miotic division is completed
Primary spermatocytes
it give rise to meiosis 2 and the 4 spermatids
Secondary spermatocytes
this cells undergo spermiogenesis to become spermatozoa
spermatids
this is the mature cells capable in male capable of fertilazation and is ejaculated to uterus.
Spermatozoa
this is the mature cells capable in male capable of fertilization and is ejaculated to uterus.
Spermatozoa
sperm cell is stored in here?
epididymis
mature cells in female capable of fertilization
ovum
gonads in female is
ovaries
gonads in male is
testes
in oogenesis, at sexual differentiation stage it undergo mitosis many times, to form many daughter oogonia
oogonia
in oogenesis, at after birth stage this cells enter first phase also known as reduction division.
Daughter oogonia
primary oocyte is characterized by:
- PAIRING of chromosome
- Replacation of each chhromosome to form 2 CHROMATIDS
- CROSSING over of genetic material
luteinizing hormone surge in this type of oocyte
secondary oocyte
this complete the first meieiotic division and also give rise to ovum, take note the appearance of 1ST POLAR BODY
secondary oocyte
the appeance of 2nd polar body
OVUM
ZYGOTE will travel along to the
Fallopian tube
zygote will impplant it self into the
endometrium of the uterus
this hormone ensure the endometrium is just the right layer and thickness for the developing embryo
estrogen
microlecithal code
S- scanty
I- isolecithal (equal distib)
P- Placental mammal
Mesolecithal egg
M- moderate amount
I- increasing gradient
A- amphibian
Macrolecithal egg
L- large amount
T- telolecithal
B- bird
