Bio Reproduction Flashcards
Zygote
the single cell which results from fertilization
fertilization
the fusion of gametes
gametes
specialized sex cells which provide genetic material for sexual reproduction
Ovulation
the release of a mature egg cell from a follicle
Follicle Stage
- egg cell matures
- uterine lining builds up
Stages of the Menstrual Cycle
- Follicle Stage
- Ovulation
- Corpus Luteum Stage
Vagina
passageway between uterus and the outside
Cervix
narrow opening between uterus and vagina
Uterus
- thick muscular walls
- where the embryo develops
oviducts
- tubes which connect each ovary to the uterus
ovaries
- produce female gametes
- produce progesterone
- produce estrogen
penis
deposits sperm cells into female reproductive tract
urethra
tube which carries sperm and urine
vas deferens
tube which carries sperm from testes to the urethra
epididymis
stores sperm
scrotum
sac of skin which contains testes and keeps testes at 94 deg for optimum sperm production
testes
- produce male gametes
- produce testosterone
- controls secondary sex characteristics
amnion
membranes which surround and cushions the embryo
umbilical cord
connects the placenta and embryo
placenta
structure which exchanges nutrients, oxygen, and waste
amnion
surrounds embryo
allantois
stored metabolic wastes
Cowper’s gland
provides liquid environment for sperm
seed coat
Outer covering of the ovule
receptacle
stem part where flower originates
Sepal
protect flower bud
petal
used to attract pollinators
ovary
contains the ovules and produces eggs
Style
supports stigma
Stigma
receives pollen grains
Filament
supports each anther
anther
produces pollen
pistil
- female reproductive structure
- 3 parts
Stigma, Style, Ovary
Stamen
- male reproductive structure
- 2 parts - anther and filiment
identical twins
develop from same egg and sperm
Fraternal Twins
develop from 2 twins and 2 sperm
Menstruation
uterine lining breaks down and is discharged from body
Corpus Luteum Stage
progesterone gets released from the ovary
chorion
outer most membrane
differentiation
process by which unspecialized cells become specialized cells, tissues, and organs
gastrulation
hollow ball embryo becomes 3 germ layer embryo called gastrula
cleavage
a series of mitotic cell divisions
oogenesis
the production of egg cells in the ovaries
spermatogenesis
the production of sperm cells in the testes
homologous chromosomes
pairs of chromosomes which are the same size and shape and control the same characteristics
haploid
half of the complete number of chromosomes
chromosome number
diploid
the complete number of chromosomes for a given species
- all cells of an organism have the diploid number of chromosomes except gametes
(chromosome number)
sexual reproduction
the production of a new individual resulting from the union of genetic material from two different sources or two different parents
Only ________ have the haploid number of chromosomes
gametes
karyotype
representation of individual chromosomes that have been cut out of a photograph and arranged in pairs and placed in order of size