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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Textbook Question
Chapter 7, Problem 7LTB
The production of gametes. ___________.
- begins at puberty in males and females;
- requires that the testes of males produce semen;
- results in the production of diploid cells from haploid cells;
- begins at puberty in females;
- produces sperm and eggs that carry half the number of chromosomes as non gametes
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Fill in the blank:
The number of chromosomes normally present in a human sperm cell is _______________________.
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.
Chapter 7 Solutions
Biology: Science for Life with Physiology (6th Edition) (Belk, Border & Maier, The Biology: Science for Life Series, 5th Edition)
Ch. 7 - List several ways in which meiosis differs from...Ch. 7 - Add labels to the figure that follows, which...Ch. 7 - Prob. 3LTBCh. 7 - A sperm cell follows which path? seminiferous...Ch. 7 - An egg cell that is not fertilized follows which...Ch. 7 - Which of the following is mismatched? urethra:...Ch. 7 - The production of gametes. ___________. begins at...Ch. 7 - If humans have 23 pairs of chromosomes, each...Ch. 7 - Prob. 9LTBCh. 7 - Prob. 10LTB
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- In both males and females, primary sex organs called _________________ produce the gametes.arrow_forwardDuring the cleavage stage, this process takes the zygote from a single celled organism to multicellular morula. Question 8 options: Oogenesis Spermatogenesis Cytokinesis Mitosis Meiosisarrow_forwardTrue or false sperm and ova or not identical to the parent cells that produce them?arrow_forward
- The tail of a sperm cell is a __________.arrow_forwardTelomeres ___________. Group of answer choices are similar in function to free radicals None of these are true are transmitted through breast milk in infants can explain menopausearrow_forwardA discussion of hormonal and physical changes required for gametes to be produced and released using the anatomic featuresarrow_forward
- The term __________ refers to the entire lower area of the abdomen. inguinal umbilicusarrow_forwardsea star oral 4.The male gonads are called the _______________ and the female gonads are called the ____________________.arrow_forwardThe period of development during which the contents of a zygote is divided into smaller and smaller cells is ___________.arrow_forward
- Polar bodies are formed during spermatogenesis but not oogenesis True Falsearrow_forwardNumber in correct order (1–6) from the earliest to the latest stage of development. ________ corpus albicans ________ corpus luteum ________ mature (graafian) follicle ________ primary follicle ________ primordial follicle ________ secondary folliclearrow_forwardThe hormone that stimulates female breast development is _____________.arrow_forward
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