Explain the complementary roles of the acrosome and cortical reactions in successful monospermic fertilization.
Tę umiejętność sprawdza 5 zadań wzorowanych na arkuszach IB z lat 2022–2024.
Cell P is a normal sperm. Cell Q has a developmental abnormality. Which consequence best explains reduced fertilization ability? A. It cannot efficiently penetrate the egg coverings to reach the egg cell membrane B. It must contain no nucleus C. It has no…
What is achieved by the acrosome reaction during human fertilization? A. Cortical granules are converted into sperm mitochondria B. Enzymes from the sperm help it pass through the zona pellucida C. All chromosomes are removed from the egg D. The sperm membrane…
Following entry of one sperm into a human egg, the cortical reaction modifies the zona pellucida. What is the principal consequence? A. The zona becomes a source of amino acids for all embryos B. Additional sperm are prevented from entering C. The egg…
Following entry of one sperm into a human egg, the cortical reaction modifies the zona pellucida. What is the principal consequence? A. The zona becomes a source of amino acids for all embryos B. Additional sperm are prevented from entering C. The egg…
Which event helps prevent additional sperm from entering an egg after one sperm has fused with it? A. Release of cortical-granule contents that alters the egg coverings B. Production of a polar body before fertilization alone C. Formation of the sperm tail D.…
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