Biology: Science for Life with Physiology (6th Edition) (Belk, Border & Maier, The Biology: Science for Life Series, 5th Edition)
Biology: Science for Life with Physiology (6th Edition) (Belk, Border & Maier, The Biology: Science for Life Series, 5th Edition)
6th Edition
ISBN: 9780134555430
Author: Colleen Belk, Virginia Borden Maier
Publisher: PEARSON
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Chapter 7, Problem 7LTB

The production of gametes. ___________.

  1. begins at puberty in males and females;
  2. requires that the testes of males produce semen;
  3. results in the production of diploid cells from haploid cells;
  4. begins at puberty in females;
  5. produces sperm and eggs that carry half the number of chromosomes as non gametes

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Sexual differentiation begins close to 4 weeks after fertilization, but cannot be seen visually until about 6 weeks post fertilization. All fetuses begin with a ______________________ gonad that is able to become either ovaries or testes, depending on the presence or absence of the Y chromosome.   If the Y chromosome is present, a region of the Y chromosome will begin expressing genes that start the process of masculinization of internal structures. This region is known as the ______________________________ region or ___________ for short. The expression of these genes causes the bipotential gonad to develop into the testes. Once the testes have started developing, two hormones, testosterone and Anti-MüllerianHormone are produced. Testosterone causes the _____________________ ducts to develop into the _____________________. Testosterone also causes the internal development of the __________________ and __________________. Anti-Müllerian Hormone causes the ______________________ ducts…
TRUE OR FALSE: Primary spermatocytes are diploid in number like spermatogonia. Secondary spermatocytes are haploid in number.
TRUE OR FALSE:  Spermatogenesis is the final stage of reproductive cell division by which there is the development of haploid spermatids into sperm while spermiation is the event by which sperm are released from their connections to Sertoli cells.
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