BIOL 1693 Module 12: Development
and inheritance Question and answers
100% correct 2025
Fertilization - correct answer ✔Fusion of an egg and sperm cell
Zygote - correct answer ✔a diploid cell resulting from the fusion of two
haploid gametes; a fertilized ovum.
Capacitation - correct answer ✔An incrase in the fragility of the membranes
of sperm cells when exposed to the female reproductive tract so that
acrosomal enzymes can be released to faciliate fertilization.
corona radiata - correct answer ✔Outer layer of cells surrounding the oocyte.
These cells are secreted by follicle cells.
zona pellucida - correct answer ✔A thick, transpartent coating rich in
glycoproteins that surrounds an oocyte.
acrosomal reaction - correct answer ✔The discharge of hydrolytic enzymes
from the acrosome, a vesicle in the tip of a sperm, when the sperm
approaches or contacts an egg.
acrosome - correct answer ✔A vesicle at the tip of a sperm cell that helps
the sperm penetrate the egg
polyspermy - correct answer ✔fertilization by more than one sperm
, fast block to polyspermy - correct answer ✔The depolarization of the egg
plasma membrane upon fertilization, designed to prevent the entry of more
than one sperm into the egg.
fertilization membrane - correct answer ✔barrier that prevents a second
sperm from entering egg
embryonic period (weeks 3-8) - correct answer ✔the period of prenatal
development that lasts from the third week until about the eighth week
pre-embryonic period - correct answer ✔first 2 weeks after conception
Morula - correct answer ✔A solid ball of cells that makes up an embryo; in
humans, this stage occurs within four days of fertilization. (16 cells)
Conceptus - correct answer ✔the zygote and associated membranes moving
to the uterus
Blastomere - correct answer ✔An early embryonic cell arising during the
cleavage stage of an early embryo.
blastocoel - correct answer ✔the fluid-filled cavity of a blastula
inner cell mass - correct answer ✔The mass of cells in the blastocyst that
ultimately give rise to the embryo and other embryonic structues (the amion,
the umbilical vessels, etc.)
and inheritance Question and answers
100% correct 2025
Fertilization - correct answer ✔Fusion of an egg and sperm cell
Zygote - correct answer ✔a diploid cell resulting from the fusion of two
haploid gametes; a fertilized ovum.
Capacitation - correct answer ✔An incrase in the fragility of the membranes
of sperm cells when exposed to the female reproductive tract so that
acrosomal enzymes can be released to faciliate fertilization.
corona radiata - correct answer ✔Outer layer of cells surrounding the oocyte.
These cells are secreted by follicle cells.
zona pellucida - correct answer ✔A thick, transpartent coating rich in
glycoproteins that surrounds an oocyte.
acrosomal reaction - correct answer ✔The discharge of hydrolytic enzymes
from the acrosome, a vesicle in the tip of a sperm, when the sperm
approaches or contacts an egg.
acrosome - correct answer ✔A vesicle at the tip of a sperm cell that helps
the sperm penetrate the egg
polyspermy - correct answer ✔fertilization by more than one sperm
, fast block to polyspermy - correct answer ✔The depolarization of the egg
plasma membrane upon fertilization, designed to prevent the entry of more
than one sperm into the egg.
fertilization membrane - correct answer ✔barrier that prevents a second
sperm from entering egg
embryonic period (weeks 3-8) - correct answer ✔the period of prenatal
development that lasts from the third week until about the eighth week
pre-embryonic period - correct answer ✔first 2 weeks after conception
Morula - correct answer ✔A solid ball of cells that makes up an embryo; in
humans, this stage occurs within four days of fertilization. (16 cells)
Conceptus - correct answer ✔the zygote and associated membranes moving
to the uterus
Blastomere - correct answer ✔An early embryonic cell arising during the
cleavage stage of an early embryo.
blastocoel - correct answer ✔the fluid-filled cavity of a blastula
inner cell mass - correct answer ✔The mass of cells in the blastocyst that
ultimately give rise to the embryo and other embryonic structues (the amion,
the umbilical vessels, etc.)
