CAMPBEL BIOLOGY:CONCEPTS & CONNECTIONS
10th Edition
ISBN: 9780136538820
Author: Taylor
Publisher: INTER PEAR
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Chapter 27, Problem 18TYK
Should parents undergoing in vitro fertilization have the right to choose which embryos to implant based on genetic criteria, such as the presence or absence of disease-causing genes? Should they be able to choose based on the sex of the embryo? How could you distinguish acceptable from unacceptable criteria? Do you think such options should be legislated?
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In vitro fertilization (IVF) is a common assistive reproductive technology for couples who are struggling to conceive naturally; however, the success rate of IVF is, at best, about 55%. Researchers seeking to improve the success of IVF need to observe the interaction between sperm and eggs in order to better understand the factors that favour fertilization. Obviously, larger sperm and eggs would be easier to observe, even with the aid of microscopy. On this basis, which of the following vertebrate groups might be a good model for studying IVF because they are likely contain species with large sperm and eggs?
Group of answer choices
a) fish
b) amphibians
c) reptiles
d) birds
e) mammals
What is an ethical use of prenatal screening and pre-implantation screening (since sometimes, fetuses found with down-syndrome are discarded; there are also cultures where, male offspring is preferred so embryos screened and found to be females are discarded?
hich of the following rows identifies the structure responsible for maintaining the endometrium before implantation, and the structure that implants into the endometrium, respectively?
Select one:
a.
Structure that maintains the endometrium
Structure that implants in the endometrium
Placenta
Zygote
b.
Structure that maintains the endometrium
Structure that implants into the endometrium
Corpus luteum
Zygote
c.
Structure that maintains the endometrium
Structure that implants into the endometrium
Corpus luteum
Blastocyst
d.
Structure that maintains the endometrium
Structure that implants in the endometrium
Placenta
Blastocyst
Chapter 27 Solutions
CAMPBEL BIOLOGY:CONCEPTS & CONNECTIONS
Ch. 27 - This graph plots the rise and fall of pituitary...Ch. 27 - Turns into the corpus luteum a. vas deferens b....Ch. 27 - a. vas deferens b. prostate gland c. endometrium...Ch. 27 - Prob. 4TYKCh. 27 - Prob. 5TYKCh. 27 - Site of human gestation a. vas deferens b....Ch. 27 - Prob. 7TYKCh. 27 - Secretes seminal fluid a. vas deferens b. prostate...Ch. 27 - Prob. 9TYKCh. 27 - After a sperm penetrates an egg, it is important...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- In-vitro fertilization occurs in the laboratory. The resulting embryos remain in a laboratory culture for up to six days before being transferred to the potential mother. If fertilization had occurred naturally (i.e., inside the female reproductive system instead of in-vitro), where would the embryo be and what developmental processes would it be undergoing during those first six days of development?arrow_forwardWhat is the difference between in vitro fertilization (IVF)and artificial insemination? Select one: a. IVF involves fertilization outside the body, whereas artificial insemination involves internal fertilization. b. During IVF, gametes are introduced into the womb, whereas during artificial insemination, a blastocyst is implanted on the uterus. c. IVF includes giving the woman additional FSH and LH to induce superovulation, whereas artificial insemination involves a woman undergoing any hormonal treatment. d. Artificial insemination can be used during a surrogacy, whereas IVF cannot.arrow_forwardA couple has a young child who needs a bone marrow transplant. They propose that preimplantation screening be done on several embryos fertilized in vitro to find a match for their child. What do they need to match in this transplant procedure? The couple proposes that the matching embryo be transplanted to the mother’s uterus and serves as a bone marrow donor when old enough. What are the ethical issues (if any) involved in this proposal?arrow_forward
- Some couples practice natural family planning (also known as the rhythm method of birth control), which involves abstaining from sexual intercourse during the time that a woman can become pregnant in her menstrual cycle. The egg only survives in the Fallopian tube for 24 hours after ovulation, so conception can only happen during a 24-hour period each month. However, this form of contraception is very unreliable and is not recommended for couples who are actively trying to avoid pregnancy. Which of the following is NOT a reason why this form of birth control is unreliable? Select one: a. Women always ovulate on the same day of their menstrual cycle every month. b. Ovulation can be affected by stress or illness. c. Sperm can survive in the Fallopian tubes for 3 to 5 days. d. It is difficult to predict exactly when in her cycle a woman ovulates.arrow_forwardwhen 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_forwardA: Why do sea urchins have external fertilization? [Discuss the life style of the developing sea urchin embryo in the water column compared to a very different ecological niche of the adults on the ocean floor. Besides, would you want to give live birth to a sea urchin! ouch!] 2: Then why don't the parents take care of the young? [In fact the adults do in a way. After the embryo has grown large enough and metamorphosed into a young urchin they hide in the spines of the adults, living off of the scraps of food produced from the messy eating of the adults] 3: Because the urchin life involves two or more ecological niches, they are more susceptible to predation and exposure to environmental toxins. What environmental conditions, predators and toxins might they be exposed to at each stage?arrow_forward
- Jack and Gill are married couples with three children . The couple consulted a family planning clinic . As the nurse manning the clinic you counselled the couple regarding family planning . Jack asks the nurse about vasectomy . He understands that this is a minor operation and asks if he'll become sterile immediately . The nurse's best response is: “No you'll remain fertile ." It may takes several weeks and as many as 30 to 40 ejaculations to remove all the live sperm." You'll be sterile in 2 to 3 days ." If the procedure is done correctly you'll be sterile immediatelyarrow_forwardSuppose that in the near future, you are a prenatal care provider. In the most recent ultrasound checkup on the expecting mother, you unfortunately found that the fetus is suffering a neural tube defect in the form of anencephaly. Seeing as the mother is still in the 12th week of pregnancy or the 1st trimester, the pregnancy can still be terminated via medical means. How would you explain to the parents the situation they are in?arrow_forwardSuperovulation is when women take hormones in order to release more eggs for fertilization. Which of the following rows contains hormones that are involved in developing the follicles and releasing them from the ovary, respectively? What could be the unintended consequence of this process? Select one: a. Hormone Unintended Consequence FSH and LH The formation of twins or multiple births b. Hormone Unintended Consequence FSH and LH A tubal ligation c. Hormone Unintended Consequence FSH and LH Scar tissue on the Fallopian tubes d. Hormone Unintended Consequence LH and FSH Ovarian Cancerarrow_forward
- What is the definition implantation?arrow_forwardSome couple practice natural family planning (also known as the rhythm method of birth control), which involves abstaining from sexual intercourse during the time that a woman can become pregnant in her menstrual cycle. The egg only survives in the fallopian tube from 24 hours after ovulation, so conception can only happen during a 24-hour period each month. However, this form of contraceptive is very unreliable and is not recommended for couples who are actively trying to avoid pregnancy. Which of the following is NOT a reason why this form of birth control is unreliable? A. Sperm can survive in the fallopian tubes for 3 to 5 days. B. Ovulation can be affected by stress or illness. C. Women always ovulate on the same day of their menstrual cycle every month. D. It is difficult to predict exactly when in her cycle a woman ovulates.arrow_forwardDuring the early stages of family planning, a client asks their nurse how over the counter pregnancy tests work. The most appropriate explanation is that the pregnancy test detects the presence of _______ in the urine. Question 22 options: a) Gonadotropin releasing hormone (GnRH) b) Human chorionic gonadotropin (hCG) c) Progesterone d) Luteinizing hormone (LH)arrow_forward
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