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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Codule 3: The principles of heredity
1. Let's take the example of the gray kangaroo (Macropus fuliginosus) whose ploidy is 8 and the sexual determinism
of this species is carried out according to the XY mode. From a male kangaroo:
a) Draw the karyotype of this individual, obtained by stopping division at metaphase. Your drawing should
include:
a. All maternal and paternal chromosomes involved (different colors)
b. An example of autosome and heterochromosome
c. An example of homologous chromosome, sister chromatid and centromere.
d. The total number of chromosomes in a metaphase kangaroo cell.
e. A sentence to explain the difference between the terms gene and allele that might apply to this
species.
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DELL
Select two that apply. Which of the following generate genetic diversity in meiosis?
homologous chromosomes are separated during anaphase II
homologous chromosomes align individually during metaphase II
O bivalents align independently from other bivalents during metaphase I
sister chromatids exchange genetic material during prophase I
homologous chromosomes exchange genetic material during prophase I
meiosis goes through two rounds of division
Fill 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).
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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- . A mature female wolf, with 78 diploid chromosomes in each somatic cell, produces haploid oocytes (egg cells) containing how many chromosomes per cell? 1 sex-determining chromosome (Y) and 38 autosomes 2 sex-determining chromosomes (XX) and 76 autosomes 1 sex-determining chromosome (X) and 39 autosomes 2 sex-determining chromosomes (XY) and 76 autosomes 1 sex-determining chromosome (X) and 38 autosomesarrow_forwardSequence meiosis. A tapir is a mammal. They have 28 autosomes and 2 sex chromosomes in each of their brain cells. What is the number of autosomes and sex chromosomes contained in a tapir’s sperm? 28 autosomes and 2 sex chromosomes 14 autosomes and 1 sex chromosome 28 autosomes and 1 sex chromosome 56 autosomes and 4 sex chromosomesarrow_forwardFill 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_forward
- Meiosis The process of meiosis Meiosis is a special type of cell division necessary for the production of sex cells (gametes) for the purpose of sexual reproduction. 2N cell (diploid). N is the haploid number of chromosomes. Each chromosome is replicated. DNA replication precedes meiosis. If genetic mistakes (mutations) occur here, they will be passed on (inherited by the offspring). Crossing over has occurred. Meiosis involves a single chromosomal duplication followed by two successive nuclear divisions, and it halves the diploid chromosome number. Homologous chromosomes pair up. The pairs are separated. An overview of meiosis is shown on the right. Meiosis occurs in the sex organs of plants and animals. An intermediate cell forms with a replicated copy of each chromosome. Meiosis produces variation During meiosis, a process called crossing over may occur when homologous chromosomes may exchange genes. This further adds to the variation in the gametes. Chromatid The chromosomes line…arrow_forwardMULTIPLE 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,…arrow_forwardDraw the stages of MEIOSIS. Start with two pairs of homologous chromosomes (this is how many PAIRS of chromosomes the somatic cell would have). Start with the END OF G2, then continue with the different stages of MEIOSIS, and then finish with the BEGINNING of G1.arrow_forward
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