INTEGRATED PRINC.OF ZOOLOGY(LL)(FD)
17th Edition
ISBN: 9781260704310
Author: HICKMAN
Publisher: MCGRAW-HILL CUSTOM PUBLISHING
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Chapter 7, Problem 4RQ
Define two alternatives to bisexual reproduction—hermaphroditism and parthenogenesis—and offer a specific example of each from the animal kingdom. What is the difference between ameiotic and meiotic parthenogenesis?
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Chapter 7 Solutions
INTEGRATED PRINC.OF ZOOLOGY(LL)(FD)
Ch. 7 - Define asexual reproduction, and describe four...Ch. 7 - Prob. 2RQCh. 7 - Explain why genetic mutations in asexual organisms...Ch. 7 - Define two alternatives to bisexual...Ch. 7 - Define the terms dioecious and monoecious. Can...Ch. 7 - Prob. 6RQCh. 7 - What is a germ-cell line? How do germ cells pass...Ch. 7 - Explain how a spermatogonium, containing a diploid...Ch. 7 - Prob. 9RQCh. 7 - Name the general location and give the function of...
Ch. 7 - Prob. 11RQCh. 7 - What are the male sex hormones and what are their...Ch. 7 - Explain how the female hormones GnRH, FSH, LH, and...Ch. 7 - Explain the function of the corpus luteum in the...Ch. 7 - Describe the role of pregnancy hormones during...Ch. 7 - If identical human twins develop from separate...Ch. 7 - Fish and amphibians tend to have less complex...
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- Which statement does not accurately describe what occurs during the process of meiosis? A) All stages of meiosis follow DNA replication. B) Meiosis produces gametes with the haploid chromosome number. C) Meiosis produces four identical gametes, either egg or sperm. D) Genetic variation among sexually reproducing organisms is enhanced by meiosis. Not Gradedarrow_forwardDistinguish between the following terms: somatic cell and gamete; autosome and sex chromosomes; haploid and diploid. Describe the events that characterize each phase of meiosis. Describe three events that occur during meiosis I but not mitosis. Name and explain the three events that contribute to genetic variation in sexually reproducing organisms.arrow_forwardWhich of the following is NOT correct about oogenesis? * O the oocyte undergoes meiosis to produce one egg cell and three polar bodies O the oocyte undergoes mitosis to produce female gametes ) it occurs only in females diploid cell undergoes meiosis to produce four haploid cells it includes asymmetric division during gametes formation OO OOarrow_forward
- Gametogenesis in mammals is a complex process. When comparing spermatogenesis and oogenesis, indicated whether the follow statements are true or false. After the S phase, both the spermatogonial stem cell and primary oocyte have the same number of double-copy chromosomes. #analyze Question 1 options: True False Both the first polar body and the second polar body have the same number of chromosomes. #analyze Question 2 options: True False After the S phase, both the spermatogonial stem cell and primary oocyte have the same number of double-copy chromosomes. #analyze Question 3 options: True False Both the primary oocyte and the secondary spermatocyte have double-copy chromosomes. #analyze Question 4 options: True Falsearrow_forwardOne of the advantages of sexual reproduction is that it promotes genetic diversity in the offspring. This is because gametes are produced by meiosis, which introduces genetic variation into the resulting gametes. How does meiosis accomplish this? Describe one way (there are several choices) in which meiosis produces new combinations of genes in gametes.arrow_forwardDescribe the formation of a zygote. How many pairsof chromosomes are in a zygote, and where do thechromosomes within a pair come from?arrow_forward
- Indicate whether each of the following cells is haploid or diploid. Cell type Haploid or diploid? Microspore Primary spermatocyte Microsporocyte First polar body Oogonium Spermatid Megaspore Ovum Secondary oocyte Spermatogoniumarrow_forwardDuring polyembryony, if one embryo is formed from synergids and the other from nucellus, state the one that is haploid and the one that is diploid.arrow_forwardHow do meiosis, fertilization, diploid cells, and haploid cellsinteract in a sexual life cycle?arrow_forward
- Which one of the following entries most accurately describes the stage at which oogenesis is reinitiated? Oogenesis is reinitiated at prophase of mitosis Oogenesis is reinitiated at prophase I of meiosis Oogenesis is reinitiated at prophase II of meiosis Oogenesis is not reinitiated.arrow_forwardDescribe one similarity and one difference between selfing and asexual reproduction.arrow_forwardWhich statements are true about meiosis? **Select 2 choice(s)** a) It increases the number of chromosomes. b)It duplicates the number of chromosomes by 2. c)It occurs in an organism's reproductive organs. d)It reduces the number of chromosomes by half. e)It occurs when a single haploid cell divides twice. f)It results in the formation of multiple diploid cells. Please I need a surely answer and a quicker responsearrow_forward
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