What would be the result of a mutation that reduces the amount of acrosomal enzymes?
A. Male infertility due to inability of the sperm to tunnel through the blastula.
B. Male infertility due to inability of the sperm to tunnel through the zona pellucida.
C. Female infertility due to blockage of sperm from tunneling through the allantois.
D. Female infertility due to blockage of sperm from tunneling through the archenteron.
Clarify Question
What is the key concept addressed by the question?
What type of thinking is required?
Gather Content
What do you already know about the acrosomal region? What other information is related to the question?
Choose Answer
Given what you now know, what information is most likely to produce the correct answer?
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
B. Male infertility due to inability of the sperm to tunnel through the zona pellucida.
Clarify Question
What is the key concept addressed by the question?
· This question is asking you to identify the function of the acrosomal region of the sperm.
What type of thinking is required?
· Apply level:
o You are being asked to take what you already know and use, or apply, it to the importance of the acrosomal region of the sperm.
Gather Content
What do you already know about the acrosomal region? What other information is related to the question?
· The acrosomal region of the sperm occurs between the nucleus and the front end of the sperm.
· The acrosomal region contains digestive enzymes that allow the sperm to penetrate the outer layers of the egg.
Choose Answer
Given what you now know, what information is most likely to produce the correct answer?
· The blastula is a stage of growth that occurs after fertilization. Sperm have already reached the egg if a blastula is present.
· The allantois is a membrane that is found after implantation has occurred and the pregnancy is well underway.
· The archenteron is a feature that marks gastrulation, which also occurs after fertilization.
· Without the necessary digestive enzymes, a sperm cell cannot penetrate the outer layers of an egg, which include the zona pellucida.
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
· Apply level:
o Answering this question correctly depended on your ability to use the acrosomal region of sperm in a new situation. If you got an incorrect answer, did you remember that the acrosomal region aids fertilization or that without it fertilization could not occur?
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