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WorksheetsFertilization and feotal development
Total questions: 15
Worksheet time: 8mins
Where does fertilization typically occur in the female reproductive system?
Uterus
Vagina
Ovary
Fallopian tube (oviduct)
Which of the following is the first stage that leads to fertilization?
Acrosomal reaction
Cortical reaction
Capacitation
Fusion of sperm head membrane and oocyte
Which molecules are removed from the sperm during capacitation to prepare it for the acrosomal reaction?
Enzymes, proteins, and DNA
Cholesterol, glycoprotein, and protein
Sugars, lipids, and hormones
Water, salts, and minerals
Before the acrosomal reaction occurs, what must the capacitated sperm do?
Undergo the cortical reaction
Fuse with the oocyte plasma membrane
Move through layers of follicle cells and reach the zona pellucida
Release its genetic material into the oocyte
What is the role of the hydrolytic enzymes released during the acrosomal reaction?
To block other sperm from fertilizing the egg
To provide energy for the sperm to reach the egg
To hydrolyze/digest the zona pellucida
To stimulate the oocyte to complete meiosis
What does the fusion of the sperm head trigger in Stage 3?
Acrosomal reaction.
Exocytosis.
Cortical reaction.
Hydrolytic enzyme release.
What is the function of the enzymes released during the cortical reaction?
To attract more sperm.
To destroy or alter sperm receptors on the zona pellucida.
To help the sperm nucleus fuse with the egg.
To break down the corona radiata.
What is formed when the pronuclei of the sperm and ovum fuse?
Polar body.
Secondary oocyte.
Diploid Zygote
Corona radiata.
What is embryogenesis?
The process of sperm formation.
The process by which an embryo is formed and developed.
The process of egg fertilization.
Process by which the number of cells in the developing embryo is multiplied through cell division
Which of the following is NOT one of the three embryonic germ layers formed during gastrulation?
Ectoderm.
Mesoderm.
Endoderm.
Blastocoel.
What is cleavage characterized by?
Slow cell division with significant growth.
Rapid mitotic divisions without significant growth.
Formation of three germ layers.
Organ formation.
What is organogenesis?
The process of forming germ layers.
The process of cell division.
The process of organ formation.
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What is the initial stage of organogenesis?
Gastrulation.
Cleavage.
Neurulation.
Fertilization.
A researcher is studying fertilization in vitro and observes that sperm are able to bind to the zona pellucida but are unable to penetrate it. Which of the following is the MOST likely cause of this failure?
Defective sperm mitochondria
A mutation in the gene encoding hyaluronidase
Inability of the oocyte to undergo the cortical reaction
Failure of the sperm to undergo capacitation
The cortical reaction is initiated by the fusion of the sperm head membrane and the oocyte plasma membrane. What is the PRIMARY purpose of the cortical reaction?
To stimulate the completion of meiosis in the oocyte
To block polyspermy
To facilitate the fusion of the sperm and egg nuclei
To provide nutrients for the developing zygote
