HUMAN BIOLOGY W MASTERING BIOLOGY
15th Edition
ISBN: 9781323510803
Author: Johnson
Publisher: PEARSON C
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Chapter 21, Problem 3AWK
Summary Introduction
To review:
The fact that many sperms but only one egg are produced in the process of fertilization. Also, explain the possibility of successful reproduction in case the cell number is inverted.
Introduction:
One of the two ovaries releases an egg during ovulation. The egg travels down the oviduct with the help of cilia. The sperms deposited in the vagina near the cervix travel to encounter the egg in the oviduct. It is incredible that sperm and egg find each other despite the journey each must take.
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Check out a sample textbook solutionStudents have asked these similar questions
If meiosis produce haploid cells, how is the diploid numberrestored for those organisms that spend most of their life cycle in the diploid state?
a. DNA replication
b. reverse transcription
c. synapsis
d. fertilization
A human cell that has gone through the second division of meiosis will contain how many chromosomes?
What kinds of cells would the haploid cells be if meiosis were occurring in a plant? in an animal?
Chapter 21 Solutions
HUMAN BIOLOGY W MASTERING BIOLOGY
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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- Which process taking place in the nucleus of a cell leads to variation in the offspring during reproduction?arrow_forwardSome organisms reproduce sexually while other organisms reproduce asexually. Which would be an example of asexual reproduction?arrow_forwardHow does the production of sperm differ from the production of eggs? a. Sperm production involves meiosis, whereas egg production involves only mitosis. b. Meiosis during sperm production produces four sperm cells, whereas meiosis during egg production produces only one functional egg cell. c. Sperm are haploid, whereas eggs are diploid. d. Sperm production begins during fetal development, whereas the meiotic process that begins egg production doesn’t begin until pubertyarrow_forward
- Which event occurs during meiosis that increases genetic variation and contributes to the process of evolution? A. Cytokinesis occurs and separates the cytoplasm and its contents into daughter cells. B. Diploid gametes divide to form haploid daughter cells with unique genetic makeup. C. During interphase, homologous chromosomes are duplicated to form sister chromatids. D. Segments of DNA are exchanged between homologous chromosomes during crossing over.arrow_forwardHow is meiosis similar to mitosis? Both involve two divisions of a cell. Both occur in somatic cells. Both produce two daughter cells. Both are forms of cell reproductionarrow_forwardWhy is meiosis importantarrow_forward
- How does the process of meiosis relate to the human life cycle?arrow_forwardWhy is there a need for mitosis and meiosis? Are there characteristics that make them redundant? Explain. If you created an organism, would you use mitosis or meiosis in reproduction? Why? Provide two examples in nature of organisms that only use one process.arrow_forwardIn human life did how many chromatids does a secondary oocyte carry? 22/23/44/46 or 92arrow_forward
- What would the human life cycle be like if we have an alternation of generations? Assume that the multicellular diploid stage is similar in form to an adult human.arrow_forwardIf gametes had the same number of chromosomes as body cells, and an organism had 24 chromosomes in its body cells, how many chromosomes would it have after three generations? How does this illustrate the necessity of meiosis for gamete formation?arrow_forwardIn your own words: If cell division during gametogenesis were non-meiotic, what would be its consequence for future generations of diploid organisms? Expound.arrow_forward
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