BIOLOGY 2E
2nd Edition
ISBN: 9781506699851
Author: OpenStax
Publisher: XANEDU PUBLISHING
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Textbook Question
Chapter 18, Problem 11RQ
What is the main difference between autopolyploid and allopolyploid?
- the number of chromosomes
- the functionality of the chromosomes
- the source of the extra chromosomes
- the number of mutations in the extra chromosomes
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During meiosis, what happens during "crossing over" that generates recombinant chromosomes?
Group of answer choices
chromosomes get twisted up and often do not separate equally
non-sister chromatids swap reciprocal segments of DNA
sister chromatids swap reciprocal segments of DNA
homologous chromosomes do not pair
In some insects the female have two x chromosomes, while the males have One x chromosomes and no y chromosome .if the normal deploid number in an insect of this type is 14 what would be the number of chromosomes in the body cells of males and of females?
Which of the following describes a Homologous Chromosome?
O Chromosomes that are exactly the same and duplicated during S Phase
O Chromosomes that are the same Chromosome but come from different parents
O Chromosomes that you find in the same cell
O Chromosomes you find bound together by a Centromere
Chapter 18 Solutions
BIOLOGY 2E
Ch. 18 - Figure 18.14 Which is most likely to survive,...Ch. 18 - Figure 18.22 If two species eat a different diet...Ch. 18 - Figure 18.23 Which of the following statements is...Ch. 18 - Which scientific concept did Charles Darwin and...Ch. 18 - Which of the following situations will lead to...Ch. 18 - Which description is an example of a phenotype? A...Ch. 18 - Which situation is most likely an example of...Ch. 18 - Which situation would most likely lead to...Ch. 18 - What is the main difference between dispersal and...Ch. 18 - Which variable increases the likelihood of...
Ch. 18 - What is the main difference between autopolyploid...Ch. 18 - Which reproductive combination produces hybrids?...Ch. 18 - Which condition is the basis for a species to be...Ch. 18 - Which situation is not an example of a prezygotic...Ch. 18 - Which term is used to describe the continued...Ch. 18 - Which components of speciation would be least...Ch. 18 - If a person scatters a handful of garden pea plant...Ch. 18 - Why do scientists consider vestigial structures...Ch. 18 - How does the scientific meaning of “theory” differ...Ch. 18 - Explain why the statement that a monkey is more...Ch. 18 - Why do island chains provide ideal conditions for...Ch. 18 - Two species of fish had recently undergone...Ch. 18 - Why can polyploidy individuals lead to speciation...Ch. 18 - What do both rate of speciation models have in...Ch. 18 - Describe a situation where hybrid reproduction...
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- What is the fundamental difference between mitosis and meiosis? Be sure to include the following: types of cells produced by each process (haploid or diploid) (body cells or sex cells) types of cells that undergo each process stages involved in each process number of times the DNA is replicated number of divisions involved in each processarrow_forwardWhich of the following best describes the kinetochore? the core of proteins that forms the metaphase plate in a dividing cell a structure composed of several proteins that associate with the centromere region of a chromosome and that can bind to spindle microtubules the ring of actin microfilaments that will cause the appearance of the cleavage furrow the centromere region of a metaphase chromosome at which the DNA can bind with spindle proteinsarrow_forwardIf a cat has 38 chromosomes, how many chromosomes will each of the following cells have? hair claw tounge sperm eggarrow_forward
- Which of the following processes leads to aneuploidy, the condition of having too many or too few copies of a particular chromosome? Select all that apply. Nondisjunction of chromosomes during mitosis Nondisjunction of chromosomes during meiosis Proper separation of chromosomes during mitosis Proper separation of chromosomes during meiosisarrow_forwardIn which behaviour of chromosomes do mitosis and meiosis differ from each other? In meiosis, homologous chromosomes lie in pairs but don't cross over; whereas, in mitosis, chromosomes remain separate and undergo crossing overr. In meiosis, homologous chromosomes don’t lie in pairs and don't undergo crossing over; whereas, in mitosis, chromosomes lie in pairs and get crossed over. In mitosis, chromosomes, as a whole, move towards the opposite poles; whereas, in meiosis I, chromatids move towards the opposite poles. In meiosis, homologous chromosomes lie in pairs, and form chiasmata; whereas, in mitosis homologous chromosomes dont undergo synapsis or crossing over.arrow_forwardWhich of the following occurs in meiosis but not in mitosis? chromosome replication alignment of chromosomes at the equator ) condensation of chromatin Separation of homologous chromosomes production of daughter cellsarrow_forward
- Where are chromosomal fragments of non sister homologs exchanged and remain as part of the process called crossing over during Meiosis I before separation? synapsis centromeres cohesins chiasmataarrow_forward1) Compare and Contrast Number of chromosomal duplications Number of cell divisions Number of daughter cells produced Number of chromosomes in daughter cells How chromosomes line up during metaphase Genetic relationship of daughter cells to parent cell Functions performed in the human body Mitosis Meiosisarrow_forwardWhich of the following is characteristics of an acrocentric chromosome?1.centromere is closer to one end of the chromosome producing one long arm and one short arm 2. There is more than one centromere 3. Centromere is the center of the chromosome 4.centromere is at the very end of the chromosomearrow_forward
- Which of the following is a result of meiosis? all chromosome line up singly at the equator the cell goes through one nuclear division two identical daughter cells are formed the daughter cells are haploid and not identicalarrow_forwardPolyploid organisms of a normally diploid species are often sterile because: tetraploids are not sterile some of the chromosomes cannot synapse during mitosis none of the chromosomes can synapse during meiosis all the homologous chromosomes attempt to synapse together during meiosisarrow_forwardWhich of the following correctly describes a homologous pair of chromosomes in prophase of meiosis I? a- Two replicated chromosomes, each of which is one double-stranded DNA molecule b- Four replicated chromosomes, each of which is one double-stranded DNA molecule c- Two replicated chromosomes, each of which is two double-stranded DNA molecules d- Four replicated chromosomes, each of which is two double-stranded DNA moleculesarrow_forward
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