Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN: 9781305251052
Author: Michael Cummings
Publisher: Cengage Learning
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Chapter 7, Problem 3QP
Summary Introduction
To determine: The time taken by ovum that was fertilized on July 1, 2004, to complete meiosis.
Introduction: Humans reproduce by sexual reproduction where a male gamete called sperm, fuses with a female gamete called oocyte to produce a zygote. Gonads are the organs where the male and the female gametes are produced. The male gametes are produced with the help of male sex hormones called androgens and the female gametes are produced with the help of female sex hormones called estrogens. The process of production of zygote is referred to as fertilization.
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Students have asked these similar questions
After learning about the reproductive systems, how would advise a couple with following concern:
"If we do not want a baby for next two years, how can we calculate the safe sex period?"
She shares that her cycle is regular but not standard 28 days long cycle (so the standard explanation form different sources won't work unless you think critically)!
At what time of the female cycle is she most likely to prevent fertilization of her ovulated egg? Consider the fact that her cycle is not 28 days but longer or shorter (you pick).
Do males have any time (in their cycle- if any) when their gametes would not be able to fertilize the egg?
In other words when can intercourse lead to least chance of pregnancy? Feel free to check with your older friends, doctors, nurses, or anyone who you feel comfortable talking about this.
Young married couple had been trying to conceive a baby for 2 years without success. The husband has a sperm count in the “fertile” range. The wife menstruates regularly. What biological and hormonal indicators could you use to determine whether the woman was ovulating? Does a normal sperm count ensure male fertility?
The process of spermatogenesis produces __________ functional sperm and Oogenesis produces ___________ functional egg(s):
A.
1 and millions
B.
4 and millions
C.
4 and 1
D.
1 1 and 4
E.
4 and billions
Chapter 7 Solutions
Human Heredity: Principles and Issues (MindTap Course List)
Ch. 7.6 - Prob. 1EGCh. 7.6 - Prob. 2EGCh. 7 - As outlined in this chapter, sex can be defined at...Ch. 7 - As outlined in this chapter, sex can be defined at...Ch. 7 - Prob. 1QPCh. 7 - The Human Reproductive System Discuss and compare...Ch. 7 - Prob. 3QPCh. 7 - A Survey of Human Development from Fertilization...Ch. 7 - Prob. 5QPCh. 7 - Prob. 6QP
Ch. 7 - Prob. 7QPCh. 7 - How Is Sex Determined? The absence of a Y...Ch. 7 - Prob. 9QPCh. 7 - Mutations Can Uncouple Chromosomal Sex from...Ch. 7 - Prob. 11QPCh. 7 - Mutations Can Uncouple chromosomal Sex from...Ch. 7 - Prob. 13QPCh. 7 - Sex-Influenced and Sex-Limited Traits What method...Ch. 7 - Prob. 15QPCh. 7 - Prob. 16QPCh. 7 - Equalizing the Expression of X Chromosome Genes in...Ch. 7 - Equalizing the Expression of X Chromosome Genes in...Ch. 7 - Equalizing the Expression of X Chromosome Genes in...
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- How Is Sex Determined? The absence of a Y chromosome in an early embryo causes the: a. embryonic testis to become an ovary b. Wolffian duct system to develop c. Mllerian duct system to degenerate d. indifferent gonad to become an ovary e. indifferent gonad to become a testisarrow_forwardOvulation releases _________. a. the corpus luteum b. a primordial follicle c. a primary oocyte d. a secondary oocyte and first polar bodyarrow_forwardFigure 43.17 Which of the following statements about the menstrual cycle is false? Progesterone levels rise during the luteal phase of the ovarian cycle and the secretory phase of the uterine cycle. Menstruation occurs just after LH and FSH levels peak. Menstruation occurs after progesterone levels drop. Estrogen levels rise before ovulation, while progesterone levels rise after.arrow_forward
- The male gonads, or ___________ produce sperm in highly coiled tubes called _ _____. The female gonads are a pair of _ ____. An ¬¬¬¬ _, or fallopian tube, extends from the __________ toward a funnel-like opening at each ovary. Upon _____________ , cilia on the epithelial lining of the oviduct help collect the egg by drawing fluid from the body cavity into the oviduct. The inner lining of the uterus, the ___________, is richly supplied with blood vessels. The neck of the uterus, called the ___________ opens into the vagina. ¬¬¬__________, the formation and development of sperm, is continuous and prolific in adult human males. ________ , the development of mature oocytes (eggs), is a prolonged process in the human female. Immature eggs form in the ovary of the female embryo but do not complete their development until years later. The union of an egg and a sperm, ________ produce a _________. The zygote begins a series of cell divisions called __________, about 24 hours…arrow_forwardIn vitro fertilization (IVF) is a procedure that can help couples who are having difficulty becoming pregnant due to blocked Fallopian tubes, low sperm count, low sperm motility, or sperm that cannot penetrate the outer layer of an egg, among other conditions.Normally, an ovary produces one mature ovum per 28-day cycle. In order to ensure a successful IVF procedure, doctors try to retrieve a large number of mature eggs.In order to obtain a greater than normal number of mature eggs, doctors inject the IVF candidate with a drug such as Bravellissima, which stimulates multiple follicle development. They also administer a drug such as Centrotic, which suppresses ovulation to prevent earlier than anticipated ovulation of mature ova. Which of the following rows correctly identifies the naturally occurring hormones that the IVF drugs are imitating? Select one: a. Bravellissima Centrotic FSH Estrogen b. Bravellissima Centrotic Progesterone LH c. Bravellissima…arrow_forwardWhich of the following statements are false? A) An oocyte completes meiosis after a sperm penetrates it. B) The earliest stages of spermatogenesis occur closest to the lumen of the seminiferous tubules. C) Fertilization occurs in the oviduct. D) Effective hormonal contraceptives are currently available only for females. E) Spermatogenesis and oogenesis require different temperatures. F) Fragmentation is a type of asexual reproduction wherein an organism produces gemmules which are collections of many cells surrounded by a body wall. G) Lobsters and insects can reproduce via fragmentation.arrow_forward
- Which of the following lists the female reproductive structures that sperm will pass through on their way to fertilize an oocyte, in the correct order? a. cervix . . . vagina . . . oviduct . . . ovary b. cervix . . . oviduct . . . vagina . . . uterus c. uterus . . . cervix . . . vagina . . . ovary d. vagina . . . cervix . . . uterus . . . oviductarrow_forwardLuteinizing hormone and follicle stimulating hormone are associated with female gamete development and ovulation yet they are essential for effective male reproduction. Why?arrow_forwardThe change of successful fertilization is approximately 18% in every cycle. Why does this statistic seem so low? All of the following statements provide a reason as to why the chance of fertilization is 18% every ovarian cycle EXEPT Select one: A. Some Sperm cells are not very motile, while others are formed without a tail. B. If more than one sperm fertilizes an egg, multiple embryos can result. C. Vagina is very acidic, killing many sperm. D. There two fallopian tubes and two ovaries, but only one of them releases an ovum every cycle.arrow_forward
- What is the function of each part of the diagram?Male Reproductive System: What two phases of a person's life do testosterone determine "male" development? Consider both gonadal and brain development, as outlined in the slides, as well as secondary sex characteristics. What does this imply about gender identity later in life? Female Reproductive System:Label this diagram. What is the function of each part of the diagram? Explain IN DETAIL how the following figure describes one month in a woman's life between puberty and menopause. What is happening day by day? What happens at puberty to get it started and what happens at menopause to end it?arrow_forwardMost sexual organisms are either male or female though some are hermaphroditic. In human beings and Drosophila (fruitfly), the sex of an individual is determined by the kind of sex chromosomes they possess. Males have two types of chromosomes, a big chromosome X and a small chromosome Y while females have only one kind, 2X or XX. The X and Y chromosomes segregate during the formation of mature spermatozoa (sprematogenesis) so that a mature sperm contains only either X or Y. What is the probability of getting an X-bearing sperm? A Y-bearing sperm? How many kinds of ova as to the kind of sex chromosome present can be produce? Determine the probability of getting a boy or girl. Show your calculations.arrow_forwardMost sexual organisms are either male or female though some are hermaphroditic. In human beings and Drosophila (fruitfly), the sex of an individual is determined by the kind of sex chromosomes they possess. Males have two types of chromosomes, a big chromosome X and a small chromosome Y while females have only one kind, 2X or XX. The X and Y chromosomes segregate during the formation of mature spermatozoa (sprematogenesis) so that a mature sperm contains only either X or Y. What is the probability of getting an X-bearing sperm? A Y-bearing sperm? How many kinds of ova as to the kind of sex chromosome present can be produced? Determine the probability of getting a boy or girl. Show your calculations.arrow_forward
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