Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Textbook Question
Chapter 41, Problem 2CT
Fraternal twins are nonidentical siblings that form when two eggs nature are released, and are fertilized at die same time. Explain why an unusually high level of FSH raises the likelihood of fraternal twins.
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Fraternal twins are nonidentical siblings that form when two eggs are released and fertilized at the same time. Explain why an increased level of FSH raises the likelihood of fraternal twins.
Shared germs as well as shared genes produce identical twin similarities. Explain
_____ is a form of 46,XY intersex that affects chromosomal males. It is by far the most common form of 46,XY intersex. These individuals have testes that produce testosterone, but their bodies lack working androgen receptors. When these individuals are born they often have female-typical genitalia, and they develop female secondary sex characteristics at puberty. They also tend to develop a female gender identity.
A) Androgen insensitivity syndrome
B) Turner's syndrome
C)Congenital adrenal hyperplasia
D) 5-alpha reductase deficiency
Chapter 41 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 41 - Stuck Sperm Cells lining the epididymis secrete a...Ch. 41 - Prob. 2DAACh. 41 - Prob. 3DAACh. 41 - Prob. 4DAACh. 41 - Sexual reproduction ___ . a. requires formation of...Ch. 41 - The ___ is a genetic dead end. a. polar body b....Ch. 41 - Prob. 3SQCh. 41 - Prob. 4SQCh. 41 - During a menstrual cycle, a midcycle surge of...Ch. 41 - Prob. 6SQ
Ch. 41 - Prob. 7SQCh. 41 - Male germ cells divide by meiosis inside the...Ch. 41 - A male attains an erection when ___ . a. muscles...Ch. 41 - Prob. 10SQCh. 41 - Prob. 11SQCh. 41 - Prob. 12SQCh. 41 - Match each disease with the type of organism that...Ch. 41 - Match each structure with its description. ____...Ch. 41 - Match each hormone with its source. ____ FSH and...Ch. 41 - Prob. 1CTCh. 41 - Fraternal twins are nonidentical siblings that...Ch. 41 - Some sperm mitochondria enter an egg during...Ch. 41 - Occasionally more than one sperm penetrates and...
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- Hypothyroidism during pregnancy causes some defects in growing babies. State any two of them.arrow_forwardHypogonadism is a condition where the body does not produce enough testosterone. The symptoms of hypogonadism include infertility and a decrease in secondary sex characteristics. There are two types of hypogonadism. Primary hypogonadism is caused by problems stemming from the testicles, and secondary hypogonadism is caused by problems stemming from the hypothalamus or the pituitary gland. Individuals with hypogonadism are often treated with testosterone replacement therapy. What would be the result of testosterone injections in individuals with hypogonadism? Select one: a. GnRH LH Testosterone Decrease Decrease Increase b. GnRH LH Testosterone Decrease Decrease Decrease c. GnRH LH Testosterone Increase Increase Increase d. GnRH LH Testosterone Increase Increase Decreasearrow_forwardInfertility strikes both men and women. Describe in a summary the biological causes that impair the process of conception in both males and females. Besides mentioning specific reasons of infertility in males and females, you need to include in your answer other cause(s) that might be the result of a combination of factors originating from both men and women.arrow_forward
- What is the expected effect on reproduction on an individual with hormone levels shown above? Identify two physiological changes that will not occur due to the atypical hormone levels shown above. The graph above shows the estrogen and progesterone levels of an individual during a menstrual cycle of 28 days. The top light blue line indicates the progesterone levels and the bottom purple line indicates the estrogen levels. This individual is in luteal phase.This individual can be expected to have low levels of FSH and LH.arrow_forwardmultiple births are observed commonly in women treated for infertility with drugs that stimulate the release of gonadotropic hormones. what could be the reason?arrow_forwardThe endometrium thickens during the uterine cycle, but disintegrates if the egg is not fertilized. The disintegration and shedding of the endometrium is caused by a drop in progesterone levels an increase in estrogen levels by increase in human chorionic gonadotropin levels a drop in prolactin levelsarrow_forward
- when a woman is injected with an egg fertilized in vitro, the probability of its implanting is 20 percent. If a woman is injected with five eggs simultaneously, what is the probability that she will become pregnant?arrow_forwardIs the female in this example pregnant? How do you know? Explain how the graph would change if the opposite was true (be sure to include how the differences occur).arrow_forwardWhich of the following correctly describes the results of andropause? Select one: a. Reduction of muscle and bone mass and lower sperm count b. Increased estrogen levels and decreased testosterone levels c. Lower sperm count and increased rate of testicular cancer d. Decreased fertility and increased testosterone levelsarrow_forward
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