Pearson eText Biology: Life on Earth with Physiology -- Instant Access (Pearson+)
12th Edition
ISBN: 9780135755785
Author: Gerald Audesirk, Teresa Audesirk
Publisher: PEARSON+
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Chapter 42, Problem 5FIB
Summary Introduction
Introduction:
The female reproductive system mainly consists of the ovaries, uterus, and vagina. The egg cell formation occurs in the ovaries, the process is called oogenesis. The eggs enters into the uterine tube, where the fusion of sperm and egg occurs, this process is called as fertilization. After fertilization, the early embryo implants in the lining of uterus, where development continues. The vagina receives the sperm and serves as the birth canal.
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Spermatogenesis usually occurs during the ___________ and continues in
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12.the spermatozoa enter the vas efferens and the vas deferens and lodge in the _________.
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Spermatogenesis usually occurs during the ___________ and continues in the _________ stage in some insects. The ________ is composed of germ cells and somatic mesodermal cells. Each follicle contains a large _________ that apparently serves as trophic function. The spermatogonia undergo several __________ divisions to form the primary spermatocytes. The primary spermatocytes become _________ in somatic cells.
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Chapter 42 Solutions
Pearson eText Biology: Life on Earth with Physiology -- Instant Access (Pearson+)
Ch. 42.1 - Prob. 1TCCh. 42.1 - Prob. 2TCCh. 42.1 - Prob. 1CSCCh. 42.1 - Prob. 1CYLCh. 42.1 - Prob. 2CYLCh. 42.1 - Prob. 3CYLCh. 42.2 - Mammalian sperm dont live very long after...Ch. 42.2 - Prob. 1TCCh. 42.2 - Prob. 1HYEWCh. 42.2 - describe the human male and female reproductive...
Ch. 42.2 - explain how hormonal interactons control...Ch. 42.2 - describe spermatogenesis and oogenesis, the...Ch. 42.3 - In 2017, scientists used CRISPR Cas9 DNA editing...Ch. 42.3 - describe the principal methods of contraception,...Ch. 42.3 - Prob. 2CTCh. 42 - In humans, sperm are produced in the a....Ch. 42 - In humans, fertilization usually occurs in the a....Ch. 42 - Prob. 3MCCh. 42 - Prob. 4MCCh. 42 - Prob. 5MCCh. 42 - Reproduction by a single animal, without the need...Ch. 42 - In mammals, the male gonad is called...Ch. 42 - Prob. 3FIBCh. 42 - Prob. 4FIBCh. 42 - Prob. 5FIBCh. 42 - Oocytes develop in a multicellular structure, the...Ch. 42 - Describe the advantages and disadvantages of...Ch. 42 - Compare the structures of the egg and sperm. What...Ch. 42 - Prob. 3RQCh. 42 - List the structures, in order, through which a...Ch. 42 - Name the three accessory glands of the male...Ch. 42 - Prob. 6RQCh. 42 - Prob. 1AC
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- Figure 18.17 Which of the following statements about hormone regulation of the female reproductive cycle is false? a. LH and FSH are produced in the pituitary, and estrogen and progesterone are produced in the ovaries. b. Estradiol and progesterone secreted from the corpus luteum cause the endometrium to thicken. c. Both progesterone and estrogen are produced by the follicles. d. Secretion of GnRH by the hypothalamus is inhibited by low levels of estrogen but stimulated by high levels of estrogen.arrow_forwardIn asexual reproduction only ______ ______________is involved, and the offspring are genetically _____________________to the parent. – In Unchanging environments In sexual reproduction _______ _________________are involved, and the offspring are genetically ___________________from the parent. – Changing environments Evolution is _____________ _____________over time in a ________________________. Different organisms have different genes. How is it that so many organisms seem perfectly suited to their environment? ___________ _____ ___________________. After a genetic __________or mutation in an organism, It survives, reproduces, and passes along its genes. Beneficial ______________ develop at random. The environment “___________” beneficial adaptations. Adaptations are an inherited characteristic.arrow_forwardThe first “milk” the mother produces is called ______________. After an egg is fertilised it is called a _____________. The ______________ cells of the blastocyst will take part in placental formation.arrow_forward
- In meiosis, a __________________ cell divides to create ________________ ________________ cells that are ___________________ ___________________ the parent and each other. Meiosis is the process of _____________________ __________________arrow_forwardWhich of the following statements concerning oogenesis is false? Oogenesis begins before birth. Ova develop from stem cells called oogonia. An ovum completes meiosis II after it is fertilized. About half the oogonia complete mitosis between birth and puberty. By the time of their birth, girls have already lost about 80 percent of their oocytes.arrow_forwardIn mammals, the male gonad is called the______ . It produces both sperm and the sex hormone________ . Within the male gonad, spermatogenesis occurs within the hollow, coiled structures called_______ .arrow_forward
- meiosis is the process where organisms producé 81isping called9ametes Cells are a combination of reproductive cells, ova and spermatozoa that are produced by a unique process of cell division called. Except for it is virtually impossible for two animals to or have exactly the same genetic makeup. The genetic material in the body's cells is contained in the in the form of coiled masses of DNA called are the male reproductive cells are formed. The These are the organs where the male Testes are generally in shape and their varies among species. The testes develop near the in the portion of the abdomen. The testes are attached to their permanent home in the scrotum, by a band of connective tissue called the is the process by which the seminiferous tubules of the testes produce sperm. The inability of the penis to retract into the prepuce Is called The structure that protects the penis in animals is the link the testes with the rest of the body. They are tube-like, that contain blood…arrow_forwardWomen sometimes develop benign tumors calledovarian teratomas or dermoid cysts in their ovaries.Such a tumor begins when a primary oocyte escapesfrom its prophase I arrest and finishes meiosis Iwithin the ovary. (Normally meiosis I does not finish until the primary oocyte is expelled from theovary upon ovulation.) The secondary oocyte thendevelops as if it were an embryo. Development isdisorganized, however, and results in a tumorcontaining differentiated diploid tissues, includingteeth, hair, bone, muscle, and nerve. If a dermoidcyst forms in a woman whose genotype is Aa, whatare the possible genotypes of the cyst, assuming norecombination?arrow_forwardMeiosis in spermatogonia begins After the first ejaculation At puberty During early child hood At birth In the embryoarrow_forward
- About sexual reproduction: Involves one parent where a new individual develops being an exact copy of the parent also known as clone and no gamete or reproductive organ is involved O Only the mother contributes with the oocyte or egg where a new individual is formed with an exact copy of the mother's genes O Involves two parents, where each parent contributes with special germ cells or gametes that once united in fertilization, a new individual develops receiving genetic material from both parents and the product of gene recombination O Involves the father only which contributes with special germ cells or spermatozoa that once fertilized, a new individual develops receiving genetic material from the father and the product of gene recombination Next » « Previousarrow_forwardWhich of the following cells canundergo meiosis?a. the diploid body cells of an animalb. haploid gametesc. germ cellsarrow_forwardIn the life cycle of an animal, __________ are haploid and _________ are diploid gametes/ sex cells gametes/ somatic cells somatic cells/ gametes somatic cells/ sex cells body cells/ gametesarrow_forward
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