BIOLOGY
12th Edition
ISBN: 9781264839698
Author: Raven
Publisher: MCG CUSTOM
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Textbook Question
Chapter 11, Problem 2U
What are homologous chromosomes?
a. The two halves of a replicated chromosome
b. Two identical chromosomes from one parent
c. Two genetically identical chromosomes, one from each parent
d. Two genetically similar chromosomes, one from each parent
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Students have asked these similar questions
How can duplications arise?
A.
by uneven crossing over during meiotic prophase
B.
by the loss of a telomere
C.
by chromosome breakage and exchange of arms
D.
by spindle failure during chromosome separation
A research scientist is studying diseases associated with homologous chromosomes and notices that the same gene along the chromosome has different function what can you conclude about his findings?
A.
The homologous pairs have been recombined and therefore he is studying end joining of chromosomes
B.
He is studying sex chromosomes and the differences are because the chromosomes are from a male species organism
C.
He has identified different alleles among homologous chromosomes.
D.
He is studying basic chromosome remodeling during fertilzation
What structure is most important in forming the tetrads? a. centromere b. synaptonemal complex c. chiasma d. kinetochore
Chapter 11 Solutions
BIOLOGY
Ch. 11.1 - Prob. 1LOCh. 11.1 - Prob. 2LOCh. 11.2 - Describe how homologous chromosomes pair during...Ch. 11.2 - Prob. 2LOCh. 11.3 - Prob. 1LOCh. 11.3 - Prob. 2LOCh. 11.3 - Prob. 3LOCh. 11.4 - Prob. 1LOCh. 11.4 - Prob. 2LOCh. 11.4 - Explain the importance of the suppression of...
Ch. 11 - Prob. 1IQCh. 11 - In comparing somatic cells and gametes, somatic...Ch. 11 - What are homologous chromosomes? a. The two halves...Ch. 11 - Chiasmata form a. between homologous chromosomes....Ch. 11 - Crossing over involves each of the following with...Ch. 11 - During anaphase I a. sister chromatids separate...Ch. 11 - At metaphase I the kinetochores of sister...Ch. 11 - What occurs during anaphase of meiosis II? a. The...Ch. 11 - Which of the following does NOT contribute to...Ch. 11 - How does DNA replication differ between mitosis...Ch. 11 - Which of the following is NOT a distinct feature...Ch. 11 - Which phase of meiosis I is most similar to the...Ch. 11 - Structurally, meiotic cohesins have different...Ch. 11 - Prob. 6ACh. 11 - Diagram the process of meiosis for an imaginary...Ch. 11 - Mules are the offspring of the mating of a horse...Ch. 11 - Compare the processes of independent assortment...Ch. 11 - Aneuploid gametes are cells that contain the wrong...
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- What cellular process is responsible for genetic recombination? a. The independent alignment of homologous pairs during meiosis I b. Separation of the homologues in meiosis I c. Separation of the chromatids during meiosis II d. Crossing over between homologuesarrow_forwardAt metaphase I, homologous chromosomes are connected only at what structures? a. chiasmata b. recombination nodules c. microtubules d. kinetochoresarrow_forwardYou are experimenting with a drug that interferes with spindle formation, and replicated chromosomes fail to migrate to the poles at anaphase. What type of chromosome mutation would you expect to see? A. Aneuploidy B. Chromosome deletions C. Chromosome duplications D. Chromosome translocationsarrow_forward
- A diploid plant cell contains 2 billion base pairs of DNA. a. How many nucleosomes are present in the cell? b. Give the number of molecules of each type of histone protein associated with the genomic DNA.arrow_forwardHow is homologous recombination for DNA repair different from recombination in meiosis? Choose all correct answers. a. HR in DNA repair requires a double-strand break, but meiotic recombination does not. b. HR in DNA repair requires strand invasion, but meiotic recombination does not. c. HR in DNA repair results in identical chromosomes. Meiotic recombination results in changes to the DNA sequence of the "repaired" chromosomes. d. HR in DNA repair uses a newly synthesized identical chromosome as a template. Meiotic recombination uses a homologous chromosome as a template.arrow_forwardAny deviation in the number of chromosomes that involves individual chromosomes, as opposed to entire sets of chromosomes, is known as which one of the following?a. Aneuploidy c. Duplication b. Disomy d. Translocationarrow_forward
- A medical student is studying a liver biopsy taken from a regenerating liver following a partial hepatectomy. The student sees a dividing cell in which the chromosomes are aligned on a plate. Which of the following best describes the character of the chromosomes in the plate? A. 23 chromosomes with 2N DNA total and with each chromosome having one chromatid B. 23 chromosomes with 4N DNA total and with each chromosome having two chromatids C. 46 chromosomes with 2N DNA total and with each chromosome having one chromatid D. 46 chromosomes with 4N DNA total and each chromosome having two chromatids E. 92 chromosomes with 2N DNA total and with each chromosome having two chromatidsarrow_forwardWhen a germ cell undergoes meiosis, which event would MOST likely result in four aneuploid daughter cells? A. misalignment of the chromosomes during metaphase I B. misalignment of the chromosomes during anaphase I C. misalignment of the chromosomes during metaphase II D. misalignment of the chromosomes during anaphase IIarrow_forwardA mature female tiger, with 38 diploid chromosomes in each somatic cell, produces haploid oocytes (egg cells) with how many chromosomes per cell? A. 18 autosomes, and 1 sex-determining chromosome (Y) B. 36 autosomes, and 2 sex-determining chromosomes (XX) C. 18 autosomes, and 1 sex-determining chromosome (X) D. 34 autosomes, and 2 sex-determining chromosomes (XY) E. 17 autosomes, and 1 sex-determining chromosome (X)arrow_forward
- What is the fundamental difference between mitosis and meiosis? A. DNA is replicated twice in meiosis, but only once in mitosis. B. The number of DNA molecules per cell nucleus is cut in half in meiosis but remains constant in mitosis. C. The number of chromosomes doubles in meiosis, whereas it stays the same in mitosis. D. Mitosis involves two cell divisions, whereas meiosis only involves one.arrow_forwardWhat is the main difference between autopolyploid and allopolyploid? a. the number of chromosomes b. the functionality of the chromosomes c. the source of the extra chromosomes d. the number of mutations in the extra chromosomesarrow_forwardGive explanation X and Y chromosomes are not homologs, but in meiosis they do pair and segregate in XY organisms to create 50% haploid gametes with an X chromosome and 50% haploid gametes with a Y chromosome. How is pairing achieved? a. Since all other homologous chromosomes pair, the remaining two chromosomes pair by default. b Pairing proteins are capable of binding to different genes on the X and Y chromosomes, which allows them to pair. c. None of the statements is correct. d. They don't actually pair. Random segregation generally ensures the X and Y chromosomes separate. e.Pseudoautosomal regions that are homologous exist at the tips of both the X and Y chromosomes, and they allow pairing.arrow_forward
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