Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 19.1, Problem 1TC
Analysis of human chromosome 2 revealed that it contains both a functional centromere and the remnants of a second one. What does this finding suggest about the evolutionary origin of chromosome 2?
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Chapter 19 Solutions
Biology
Ch. 19.1 - Analysis of human chromosome 2 revealed that it...Ch. 19.1 - Origin of a Killer Analysis of nucleotide...Ch. 19.1 - explain why scientific names are necessary?Ch. 19.1 - describe the type of similarities that...Ch. 19.1 - Prob. 3CYLCh. 19.2 - Prob. 1TCCh. 19.2 - Prob. 1CYLCh. 19.2 - explain how scientists discovered that prokaryotes...Ch. 19.3 - Prob. 1HYEWCh. 19.3 - Prob. 1CYL
Ch. 19.3 - Prob. 2CYLCh. 19.4 - Prob. 1CYLCh. 19.4 - Prob. 2CYLCh. 19.4 - Prob. 1CTCh. 19 - Prob. 1MCCh. 19 - To be informative for reconstructing the phylogeny...Ch. 19 - Prob. 3MCCh. 19 - In modern systematics, classifications are...Ch. 19 - Which of the following includes all the domains...Ch. 19 - Prob. 1FIBCh. 19 - Prob. 2FIBCh. 19 - In Linnaean classification, the eight major...Ch. 19 - Systematists determine the evolutionary...Ch. 19 - Prob. 5FIBCh. 19 - The number of named species is about ________, but...Ch. 19 - What contributions did Linnaeus and Darwin make to...Ch. 19 - Prob. 2RQCh. 19 - What techniques might you use to determine whether...Ch. 19 - Only a small fraction of the total number of...Ch. 19 - In England, daddy longlegs refers to a long-legged...Ch. 19 - Why are species designations of asexually...Ch. 19 - Applying the Concepts The pressures created by...Ch. 19 - Applying the Concepts 2. During major floods, only...Ch. 19 - Consider the following list of groups: (1)...
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- Why is chromosome 21 the smallest and not chromosome 22? considering that a karyogram is arranged from largest to smallestarrow_forwardChimpanzees, gorillas, and orangutans all have 48 chromosomes, whereas humans have 46. Human chromosome 2 is a large, metacentric chromosome with G-banding patterns that closely match those found on two different acrocentric chromosomes of the apes. Which statement would BEST explain these findings? O Infection by a primate virus created a new chromosome when the viral DNA became a permanent part of the genome. Humans were not affected by this virus, so they did not acquire the extra chromosome. O Humans have the correct number of chromosomes. The extra chromosome pair in the other apes is a classic case of tetrasomy as a result of melotic nondisjunction in the primate ancestor. O A nonreciprocal translocation and subsequent fusion of the chromosomal fragments created a genome of 46 chromosomes without the loss of any genetic information. O Meiotic nondisjunction gave rise to a nullisomic gamete. The fusion of two nullisomic gametes produced the ancestor of the human species with 46…arrow_forwardDescribe the general organization of a eukaryotic chromosome. What structural role do scaffold associated regions (SARs) or matrix attachment regions (MARs) play? Where are genes primarily located relative to chromosome structure?arrow_forward
- In a germline progenitor cell before DNA replication (2N), a translocation occurred between a telocentric and submetacentric chromosome resulting in a translocation heterozygote. The location of the translocation is illustrated below. Draw the Prophase I pairing conformation that would result from this translocation. The four types of chromosomes you have now can be labeled as follows: T-WT (telocentric wild type), T-TL (telocentric translocation), SM-WT (submetacentric wild type), and SM-TL (submetacentric translocation). Using these labels, list (please do not draw) the possible outcomes of Anaphase I and the possible phenotypes for each outcome. Please explain your reasoning for each phenotype in a few words. asaparrow_forwardWhat is the structure of telomeres? short, repetitive DNA sequences found at the ends of linear eukaryotic chromosomes long, repetitive DNA sequences found at the ends of linear eukaryotic chromosomes short, repetitive DNA sequences found at the ends of linear prokaryotic chromosomes long, unique DNA sequences found at the ends of linear eukaryotic chromosomesarrow_forwardIt is also note that Chimpanzee has a chromosomal complement of 2N = 48, whereas human has 2N = 46. Interestingly, chromosomal banding patterns have revealed that the chromosome 12 and 13 of chimp show homology with human chromosome 2 (see figure for the alignment of human and chimp banding patterns). This is a good example of chromosomal aberration in evolution. What type of chromosomal rearrangement is likely explained the evolution of human chromosome 2 from the two chromosomes of chimpanzee? A. Translocation B. Duplication C. Inversion D. Deletionarrow_forward
- The genes that codes for the creation of certain blood groups are located on chromo- some "Xp22.3", chromosome "12p12.3", chromosome "2q14.3", and so on. What is this chromosome terminology? What does it mean?arrow_forwardConsider the following DNA molecule (shown in the picture) and assume this is the DNA sequence of the entire chromosomes. list the amino acid sequences of the possible protein or proteins that could be produced from this DNA sequence what would be the DNA sequence of a sister chromatid generated from this chromosome sequence? (specify the 5' nd 3' ends)arrow_forwardIn humans, chromosome 16 sometimes has a heavily stained area in the long arm near the centromere. This feature can be seen through the microscope but has no effect on the phenotype of the person carrying it. When such a “blob” exists on a particular copy of chromosome 16, it is a constant feature of that chromosome and is inherited. A couple conceived a child, but the fetus had multiple abnormalities and was miscarried. When the chromosomes of the fetus were studied, it was discovered that it had three copies of chromosome 16 (it was trisomic for chromosome 16), and that two of the three chromosome 16s had large blobs. Both chromosome 16 homologs in the mother lacked blobs, but the father was heterozygous for blobs. Which parent experienced nondisjunction, and in which meiotic division did it occur?arrow_forward
- Metacentric chromosomes have a centromere located: A. near the middle of the chromosome (chromosome has two arms of approx. equal length) B. towards one end (chromosome has one long arm and one short arm) C. near one end of the chromosome (chromosome has one long arm and a knob at the other end)arrow_forwardCells lacking telomerase can grow for several cell divisions without obvious defects. However, after more cell divisions, such cells tend to show chromosomes that have fused together. Propose an explanation for the formation of the chromosomes.arrow_forwardWhat structures are found in a chromosome? Group of answer choices Two structures for the mitotic spindle to bind, and two complex repetitive structures that are maintained by telomerase One structure for the mitotic spindle to bind, and two complex repetitive structures that are maintained by telomerase One structure for the mitotic spindle to bind, and one complex repetitive structure that is maintained by telomerase Two structures for the mitotic spindle to bind, and one complex repetitive structure that is maintained by telomerase.arrow_forward
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