Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 39.1, Problem 1TYK
Choose the correct statement.
- The majority of animals reproduce by asexual reproduction.
- Budding, regeneration, and parthenogenesis account for reproduction in nearly all invertebrates.
- A zygote is the haploid organism produced by the union of a sperm and an egg.
- Potentially beneficial alleles are more likely to accumulate in species that reproduce sexually than in asexually reproducing species.
- In asexual reproduction, gametes from each parent join to form a zygote.
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MULTIPLE CHOICE: Select the BEST ANSWER for each item by ENCIRCLING THE LETTER corresponding to the best choice.
Which of the following statements is INCORRECT?
The halving of chromosome number during gamete formation, followed by the union of two gametes at fertilization, allows a constant 2n number of chromosomes to be maintained from generation to generation in all individuals of a species.
Meiosis ensures that all somatic cells of the developing individual have identical diploid chromosome sets.
The number of chromosomes in a normal diploid cell is 2n.
Gametes and other cells that carry only a single set of chromosomes are called haploid.
Which of the following statements is INCORRECT?
Scientists usually analyze the chromosomal makeup of a cell during metaphase because this is when the chromosomes are most visible.
During metaphase, individual chromosomes have duplicated and condensed from thin threads into compact rod-like structures.
Each chromosome, during metaphase,…
Please draw the diagram and explain.
An organism with a diploid number of 6 reproduces sexually and has heterogametic chromosomes in the male. Diagram the stages of meiosis for gametogenesis in a male of this organism. Make certain you identify homologous pairs of chromosomes.
Some organisms are capable of asexual or sexual reproduction. Under favorable conditions, reproduction proceeds asexually. When conditions become more stressful reproduction switches to a sexual mode. Why?
Question options:
Sexual reproduction is simple and more rapid allowing larger numbers of offspring to be produced.
Sexual reproduction requires two separate individuals, who can mutually provide nutrient support during stress.
Sexual reproduction produces individuals with new combinations of recombined chromosomes increasing diversity.
Asexual reproduction requires more energy.
Chapter 39 Solutions
Principles of Biology
Ch. 39.1 - Choose the correct statement. The majority of...Ch. 39.2 - In _________ gametes are released in large numbers...Ch. 39.2 - In which way is gametogenesis similar in males and...Ch. 39.3 - Prob. 1CCCh. 39.3 - Prob. 1TYKCh. 39.3 - Prob. 2TYKCh. 39.4 - Prob. 1BCCh. 39.4 - Prob. 2BCCh. 39.4 - Prob. 1CCCh. 39.4 - Prob. 1TYK
Ch. 39.4 - Prob. 2TYKCh. 39.5 - The three germ layers of triploblasts are...Ch. 39.5 - Choose the correct sequence of events. cleavage...Ch. 39.6 - Under what condition(s) might you expect temporary...Ch. 39.6 - Prob. 2TYKCh. 39 - Prob. 1TYCh. 39 - Prob. 2TYCh. 39 - Spermatogonia are haploid germ cells. d. have...Ch. 39 - Prob. 4TYCh. 39 - Prob. 5TYCh. 39 - Prob. 6TYCh. 39 - A major function of FSH is to stimulate the...Ch. 39 - Prob. 8TYCh. 39 - Prob. 9TYCh. 39 - Cells of the neural crest give rise to the central...Ch. 39 - Prob. 1CCQCh. 39 - Prob. 2CCQCh. 39 - Prob. 3CCQCh. 39 - Describe the major events in animal development...Ch. 39 - Describe the events of the ovarian and uterine...
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- Most eukaryotic organisms use sexual reproduction as their primary means of perpetuating their species. Gametes are formed via meiosis. However, some species primarily reproduce via asexual means. Reproduction is accomplished via mitosis. Aspen trees most commonly reproduce by such asexual methods of cloning.What are the advantages and disadvantages of reproduction by asexual means? Why do some species reproduce in this manner? Why don't all species?arrow_forwardFill in the blanks. The parentheses represent the choices for the blank. Gametes are ______ (haploid, diploid, triploid) cells that have a single set of chromosomes. The number of chromosomes in diploid zygotes is represented as _________ (2n, 3n, n).arrow_forwardCompare between asexual and sexual reproduction Asexual Sexual Disadvantage Advantage Life Cyclearrow_forward
- Fill in the blanks. The parentheses represent choices for each blank. In sexual reproduction, _____ (meiosis, mitosis) produced genetically diverse _______ (diploid cells, haploid gametes, triploid cells).arrow_forwardGiven the table below, give the difference between the genetic composition of offspring in asexual and sexual reproduction. Explain it thoroughly. Characteristics Asexual Reproduction Sexual Reproduction Genetic composition of offspringarrow_forwardMultiple question 1.) Which of the following statements is true about mitosis and meiosis? A.) Mitosis results in formation of two daughter cells , and occurs in germ cells; whereas, meiosis results in formation of four daughter cells, and occurs in the liver. B.) Mitosis results in formation of four daughter cells, and occurs in somatic cells; whereas , meiosis results in formation of two daughter cells, divisions and occurs in germ cells C.) Mitosis results in formation of four daughter cells, and occurs in germ cellswhereas, meiosis results in daughter cells, and occurs in liver cells D.) Mitosis results in formation of two daughter cells, and occurs in somatic cellswhereas , meiosis results in formation of four daughter cellsand in germ cells. 2.) Which of the following plant parts is usually used for studying mitotic cell division A.) stem tip B.) root tip C.) bud D.) flower 3.) The cell cycle proceeds at an uncontrolled rate among cancer cells. Which of the following…arrow_forward
- Which of the following differentiates meiosis from mitosis? mitosis is used for the repair of cells, whereas meiosis creates cells for sexual reproduction. In mitosis four identical daughter cells are produced, whereas two genetically different cells are produced in meiosis meiosis is a form of asexual division, whereas mitosis is a form of sexual division mitosis occurs in prokaryotic cells, whereas meiosis occurs in eukaryotic cellsarrow_forwardThe process of meiosis occurs during the cell cycle production and results in four unique diploid four identical diploid cells four unique haploid cells four identical haploid cells . To maintain the correct number of chromosomes in offspring, male and female gametes contain the same number half of the number twice the number of chromosomes as somatic cells. During fertilization, gametes fuse to form a diploid haplid cell called a zygote.arrow_forwardPlutonian Tickle-bellies have a sex determination system just like mammals. Hairy Snout is a holandric trait (carried on the Y chromosome). MyxRotcccc, a handsome male Tickle-belly, has lovely orange hair on his snout. He and his mate, OrgggWny, have six offspring, three boys and three girls. Please answer the following questions about this family. How many of MyxRotcccc’s and OrgggWny’s offspring have hairy snouts? Can you predict which ones? Their eldest son, Bob, marries and has a son. What is the chance that Bob’s son will also have a hairy snout? JoKchew, MyxRotcccc’s and OrgggWny’s youngest daughter, marries a male who has a smooth, hairless purple snout. She has eight offspring, each one lovelier than the last, and all boys. What percentage of these offspring do you expect to have hairy snouts? Explain.arrow_forward
- Chromosomes Genetic mutation Syndrome Internal reproductive anatomy External genitalia Secondary sex characteristics Sex typically assigned at birth Barr body (Y/N) SRY gene (Y/N) Testosterone (Low/High) Menstruation (Y/N) Fertile (Y/N) 46,XX None None Female Female Female Female YES NO Low YES YES 46,XX CYP21A2 mutation or deletion Congenital adrenal hyperplasia Female Ambiguous Male but reduced Female 46,XY SRY mutation or deletion Swyer syndrome Female but nonfunctional ovaries Female Absent or female, but reduced Female 45,X Complete or partial loss of X chromosome Turner syndrome Female but absent or nonfunctional ovaries Female Absent or female, but reduced Female 46,XY Androgen receptor (AR) deletion Complete androgen insensitivity syndrome…arrow_forwardPlease answer fast What is an advantage to sexual reproduction? [Select all that apply] Group of answer choices Sexually transmitted diseases Faster evolution with sex Greater genetic diversity of offspring with sex Only females can reproduce, freeing up males to pursue other activities Need to find a mate to reproducearrow_forwardLabel all stages in animal and plant life cycle with diploid, haploid as well as meiosis, mitosis, maturation and fertilisationarrow_forward
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