Summary: Animal Development
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Read the summary and the most important questions on Animal development
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1 Define spermatogenesis and oogenesis and then compare and contrast them in humans.
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1.1 My lesson notes
This is a preview. There are 13 more flashcards available for chapter 1.1
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What does spermatogenesis produce daily?
Millions of motile sperm daily from puberty throughout life. -
How many sperm are produced from each diploid precursor cell in spermatogenesis?
Four small, motile sperm from each diploid precursor cell. -
What type of meiosis does spermatogenesis use?
Symmetric meiosis is used in spermatogenesis. -
How many oocytes mature per menstrual cycle?
Usually one oocyte maturing per menstrual cycle. -
What does one diploid spermatogonium produce?
One diploid spermatogonium produces 4 functional sperm. -
What is the cytokinesis outcome in spermatogenesis?
Cytokinesis is roughly equal, so all four become viable sperm. -
What does one diploid oogonium produce?
One diploid oogonium produces 1 functional ovum + 2–3 polar bodies. -
What is the cytokinesis outcome in oogenesis?
Cytokinesis is highly unequal; almost all cytoplasm goes into a single large egg. -
Describe the size and function of sperm.
Small, motile, streamlined; function is to deliver haploid nucleus to the egg. -
Describe the size and function of an egg (ovum).
Large, non-motile, full of cytoplasm; function is to provide nucleus + nutrients + organelles.
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