DEVELOPMENTAL BIOLOGY EXAM
WITH CORRECT ANSWERS
Embryogenesis - CORRECT ANSWER-Collective name for the
stages of development between fertilization and hatching
Stages of embryogenesis - CORRECT ANSWER-Fertilization,
cleavage, gastrulation, organogenesis, metamorphosis, and
gametogenesis
Zygote - CORRECT ANSWER-Fertilized egg, a single cell
which divides mitotically to produce all the cells of the body
Fertilization - CORRECT ANSWER-Fusion of gametes which
stimulates development and initiates a new individual
Cleavage - CORRECT ANSWER-Series of rapid mitotic
divisions following fertilization, cytoplasm of zygote divided into
smaller cells (blastomeres), and by the end formation of the
blastula
Blastula - CORRECT ANSWER-Early-stage embryo consisting
of a sphere of cells surrounding an inner fluid-filled cavity, the
blastocoel
Blastomeres - CORRECT ANSWER-Any of the cells resulting
from the cleavage of a fertilized ovum during early embryonic
development that together form the blast
Blastocoel - CORRECT ANSWER-The fluid-filled cavity within
the blastula
, Blastopore - CORRECT ANSWER-The invagination point
where gastrulation begins. For deuterostomes= anus and
protostomes= mouth
This is the dimple that becomes a ring through which cells
migrate. Those inside will become the mesoderm
Gastrulation - CORRECT ANSWER-Stage where blastomeres
undergo dramatic movements and change their positions
relative to one another, results in formation of three germ layers
Gastrula - CORRECT ANSWER-The stage of the embryo
following gastrulation in which the three germ layers are formed
Organogenesis - CORRECT ANSWER-Germ layers interact
with one another and rearrange themselves to produce tissues
and organs
Gametogenesis - CORRECT ANSWER-Development of
gametes, usually not complete until the organism is physically
mature
Vegetal hemisphere - CORRECT ANSWER-Bottom portion of
the egg which contains the yolk
Animal hemisphere - CORRECT ANSWER-Upper half of the
egg
Notochord - CORRECT ANSWER-Mesodermal rod in the most
dorsal portion of the embryo, important role in inducing and
patterning the nervous system
Neurula - CORRECT ANSWER-The embryo while the neural
tube is forming
Neural tube - CORRECT ANSWER-Embryonic precursor to
central nervous system, i.e. the brain and spinal chord
WITH CORRECT ANSWERS
Embryogenesis - CORRECT ANSWER-Collective name for the
stages of development between fertilization and hatching
Stages of embryogenesis - CORRECT ANSWER-Fertilization,
cleavage, gastrulation, organogenesis, metamorphosis, and
gametogenesis
Zygote - CORRECT ANSWER-Fertilized egg, a single cell
which divides mitotically to produce all the cells of the body
Fertilization - CORRECT ANSWER-Fusion of gametes which
stimulates development and initiates a new individual
Cleavage - CORRECT ANSWER-Series of rapid mitotic
divisions following fertilization, cytoplasm of zygote divided into
smaller cells (blastomeres), and by the end formation of the
blastula
Blastula - CORRECT ANSWER-Early-stage embryo consisting
of a sphere of cells surrounding an inner fluid-filled cavity, the
blastocoel
Blastomeres - CORRECT ANSWER-Any of the cells resulting
from the cleavage of a fertilized ovum during early embryonic
development that together form the blast
Blastocoel - CORRECT ANSWER-The fluid-filled cavity within
the blastula
, Blastopore - CORRECT ANSWER-The invagination point
where gastrulation begins. For deuterostomes= anus and
protostomes= mouth
This is the dimple that becomes a ring through which cells
migrate. Those inside will become the mesoderm
Gastrulation - CORRECT ANSWER-Stage where blastomeres
undergo dramatic movements and change their positions
relative to one another, results in formation of three germ layers
Gastrula - CORRECT ANSWER-The stage of the embryo
following gastrulation in which the three germ layers are formed
Organogenesis - CORRECT ANSWER-Germ layers interact
with one another and rearrange themselves to produce tissues
and organs
Gametogenesis - CORRECT ANSWER-Development of
gametes, usually not complete until the organism is physically
mature
Vegetal hemisphere - CORRECT ANSWER-Bottom portion of
the egg which contains the yolk
Animal hemisphere - CORRECT ANSWER-Upper half of the
egg
Notochord - CORRECT ANSWER-Mesodermal rod in the most
dorsal portion of the embryo, important role in inducing and
patterning the nervous system
Neurula - CORRECT ANSWER-The embryo while the neural
tube is forming
Neural tube - CORRECT ANSWER-Embryonic precursor to
central nervous system, i.e. the brain and spinal chord
