Human Biology: Concepts and Current Issues (8th Edition)
8th Edition
ISBN: 9780134042435
Author: Michael D. Johnson
Publisher: PEARSON
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Textbook Question
Chapter 21, Problem 2TY
Which of the following will result in fraternal twins?
a. fertilization of one egg by two different sperm
b. division of a fertilized egg into two masses after differentiation has begun
c. fertilization of two eggs by two different sperm
d. division of a fertilized egg into two masses before differentiation has begun
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Chapter 21 Solutions
Human Biology: Concepts and Current Issues (8th Edition)
Ch. 21 - Prob. 1QCCh. 21 - Prob. 2QCCh. 21 -
1. Why does only one sperm fertilize the egg, and...Ch. 21 - Prob. 2CRCh. 21 - Prob. 3CRCh. 21 - Describe the stages of labor and delivery.Ch. 21 - What causes the newborn to take its first breath...Ch. 21 - Prob. 6CRCh. 21 - What causes the onset of puberty (sexual...Ch. 21 - Summarize the three main hypotheses of the causes...
Ch. 21 - Prob. 9CRCh. 21 - Prob. 10CRCh. 21 - Which of the following lists the correct order of...Ch. 21 - Which of the following will result in fraternal...Ch. 21 -
3. Which of the following processes is the first...Ch. 21 - Prob. 4TYCh. 21 - Prob. 5TYCh. 21 - Prob. 6TYCh. 21 -
7. Which of the following is mismatched?
a....Ch. 21 - Prob. 8TYCh. 21 - Prob. 9TYCh. 21 -
10. Which of the following would be detrimental...Ch. 21 - Prob. 11TYCh. 21 - Prob. 12TYCh. 21 - Prob. 13TYCh. 21 - Prob. 14TYCh. 21 - Which hormone plays a critical role both in...Ch. 21 - Prob. 1AWKCh. 21 - Prob. 2AWKCh. 21 - Prob. 3AWKCh. 21 - Each year, it is estimated that over 40,000...Ch. 21 - Prob. 5AWKCh. 21 - Prob. 6AWKCh. 21 - How is it possible that one's life could be...
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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
- Which of the following statements is incorrect?a. The placenta secretes hormones such as progesterone, hCG, and estrogen.b. Embryonic tissue and maternal tissue forms the placenta.c. The chorion supplies nutrients to the embryo by diffusion.d. The umbilical cord is formed by one artery and two veinsarrow_forwardWhich of the following scenarios does NOT describe an event that leads to the conception of twins? Select one: a. Two eggs are fertilized by two sperm cells, resulting in fraternal twins. b. Two eggs are fertilized by one sperm cell, resulting in monozygotic twins. c. High levels of FSH stimulates maturation of three ovums. d. One egg is fertilized by one sperm but divides into two zygotes, resulting in two babies of the same gender.arrow_forwardWhich of the following structures develops into only the fetus? a. Inner cell mass b. Trophoblast c. Blastocyst d. Zygotearrow_forward
- Which of the following does NOT happen in the germinal period? a. dividing mass of cells travels to the uterus b. developing organs can be affected by toxins passing through the placenta c. mass of cells form a hollow ball d. cells begin to differentiate.arrow_forwardWhich is/are true concerning chromosomal sex determination? a. Anyone born with two x chromosomes is a male b. Sperm always contain Y chromosomes c. Testis Determining Factor is produced by the SRY allele present on the Y chromosome d. Under normal circumstances, a human embryo that has both and X and a Y chromosome is male.arrow_forwardDuring cleavage, the mass of cells: a. increases b. decreases c. doubles with every cell division d. does not change significantlyarrow_forward
- Oogenesis involves germ cells in the ovary undergoing meiosis to produce a functional ovum at the end of the process.Which of the following cells is penetrated by a sperm cell during the process of fertilization? Select one: a. Secondary oocyte b. Oogonia c. Primary oocyte d. Ovumarrow_forwardThe result of spermatogenesis is: A. 4 viable haploid spermatids B. 1 viable haploid spermatid and 3 haploid polar bodies C. 4 Viable diploid spermatids D. 1 viable diploid spermatids and 3 diploid polar bodiesarrow_forwardWhich of the following statements does NOT correctly describe the events following fertilization? Select one: a. Only the inner cell mass cells in a blastocyst are pluripotent. b. The trophoblast has an important role in maintaining the pregnancy, as it prevents the endometrium from shedding. c. As hCG takes over maintaining the endometrium immediately after implantation, the corpus luteum degenerates into the corpus albican. d. All 16 cells in a morula are truly totipotent, meaning that they can become any cells in the human body.arrow_forward
- The formation of three germ layers is called Select one: a. gastrulation b. pluripotency c. differentiation d. neurulationarrow_forwarda. If a couple had more than one child, would all the children have the same bands as the first one? b. Which event in meiosis might explain your answer?arrow_forwardWhich of the following rows identifies the site of fertilization and the area in which a fertilized egg implants, respectively? Select one: a. Site of Fertilization Site of Implantation Fallopian tube Endometrium b. Site of Fertilization Site of Implantation Uterus Placenta c. Site of Fertilization Site of Implantation Uterus Endometrium d. Site of Fertilization Site of Implantation Fallopian tube Placentaarrow_forward
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