BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 38, Problem 2CT
Summary Introduction
To describe:
The reason that the increased level of
Introduction:
Fertilization is the process in which male and female gametes are fused to make an embryo. This embryo later develops into a whole organism. Hormones play a vital role in the regulation of gamete formation and assisting the development of the embryo.
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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.
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Chapter 38 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Ch. 38 - Prob. 1SACh. 38 - Prob. 2SACh. 38 - Testosterone is secreted by the _______. a. testes...Ch. 38 - Prob. 4SACh. 38 - Prob. 5SACh. 38 - Prob. 6SACh. 38 - Match each term with the most suitable...Ch. 38 - Prob. 8SACh. 38 - A human blastocyst normally implants in...Ch. 38 - Put these human developmental events in order,...
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- Why is advanced maternal age high risk?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_forwardIf there is no fertilization, oocyte will arrested at?arrow_forward
- Shared germs as well as shared genes produce identical twin similarities. Explainarrow_forwardWhat 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_forwardThe period of female fertility during each Month is short For fextilization to take place intercouce must occur each a) A few hours before ovalation up to 4-5 days after avulation b) Around 24 hours before ovulation up to around. 24 hours after ovulation C) Sometimes between 2-3 days before ovulation upto 2-3 days after ovulation d) Around 4-5 days before ovulation upto a few hours after ovulation E) Around 4-5 days before ovulation upto 4-5. after ovulation.arrow_forward
- Explain maternal stunting in detail Provide examplesarrow_forwardContrast the biological advantages of hermaphroditism that involves cross-fertilization with hermaphroditism that involves self-fertilization.arrow_forwardReferring to Figure 1.11, do plains zebras, warthogs, and greaterkudus have normal or exceptional gestation lengths? Justify yourposition in each case.arrow_forward
- Explain why the adolescent gravida is at greaterrisk of complications of pregnancy.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_forwardSuppose you are a carrier of fragile X syndrome and want to have children. Would you choose pregnancy, adoption, or surrogacy? If you became pregnant, would you opt for prenatal diagnosis? Explain your decisions.arrow_forward
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