EBK GENETICS: FROM GENES TO GENOMES
5th Edition
ISBN: 8220100255250
Author: HARTWELL
Publisher: YUZU
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Textbook Question
Chapter 12, Problem 44P
Using whole-genome sequencing, how could you distinguish between autopolyploids and allopolyploids?
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Compare an autotetraploid and an allotetraploid to each other with respect to the characteristics listed below. Answer auto, allo, both or neither for each statement. a) Balanced and unbalanced gametes can form.b) Contains 4 homologous copies of every chromosome.c) Originated from 2 different ancestral diploid species.d) Fully fertile.
Discuss the following sets of terms:
a) trisomy and triploidy,
b) aneuploidy and polyploidy.
What is endopolyploidy? What is its biological significance?
Chapter 12 Solutions
EBK GENETICS: FROM GENES TO GENOMES
Ch. 12 - For each of the terms in the left column, choose...Ch. 12 - Prob. 2PCh. 12 - For each of the following types of chromosomal...Ch. 12 - For the following types of chromosomal...Ch. 12 - One of the X chromosomes in a particular...Ch. 12 - Prob. 6PCh. 12 - Prob. 7PCh. 12 - Prob. 8PCh. 12 - Two wild-type fragments of human genomic DNA from...Ch. 12 - Indicate which of the four major classes of...
Ch. 12 - The recessive, X-linked z1 mutation of the...Ch. 12 - Genes a and b are 21 m.u. apart when mapped in...Ch. 12 - In the following group of figures, the pink lines...Ch. 12 - Three strains of Drosophila Bravo, X-ray, and...Ch. 12 - Prob. 15PCh. 12 - Suppose a haploid yeast strain carrying two...Ch. 12 - In the mating between two haploid yeast strains...Ch. 12 - During ascus formation in Neurospora, any...Ch. 12 - In the following figure, black and pink lines...Ch. 12 - In Drosophila, the gene for cinnabar eye color is...Ch. 12 - Semisterility in corn, as seen by unfilled ears...Ch. 12 - Prob. 22PCh. 12 - Prob. 23PCh. 12 - Prob. 24PCh. 12 - Duchenne muscular dystrophy DMD is caused by a...Ch. 12 - Explain how transposable elements can cause the...Ch. 12 - The Drosophila genome normally harbors about 40 P...Ch. 12 - Prob. 28PCh. 12 - Fred and Mary have a child named Bob. The genomic...Ch. 12 - Uniparental disomy is a rare phenomenon in which...Ch. 12 - Among adults with Turner syndrome, it has been...Ch. 12 - In Neurospora, his2 mutants require the amino acid...Ch. 12 - Human geneticists interested in the effects of...Ch. 12 - The incidence of Down syndrome will be very high...Ch. 12 - The Drosophila chromosome 4 is extremely small;...Ch. 12 - Down syndrome is usually caused by having a...Ch. 12 - Common red clover, Trifolium pratense, is a...Ch. 12 - The numbers of chromosomes in the somatic cells of...Ch. 12 - Prob. 39PCh. 12 - Somatic cells in organisms of a particular diploid...Ch. 12 - Prob. 41PCh. 12 - Prob. 42PCh. 12 - Chromosomes normally associate during meiosis I as...Ch. 12 - Using whole-genome sequencing, how could you...Ch. 12 - Prob. 45PCh. 12 - Prob. 46PCh. 12 - Seedless watermelons that you find in the...Ch. 12 - Prob. 48PCh. 12 - What characteristic property of translocations...Ch. 12 - In examining the genome of the rice Oryza sativa...Ch. 12 - Prob. 51PCh. 12 - Prob. 52PCh. 12 - The accompanying figure shows idiograms of human...
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- After genetic selection, some originally diploid species can become triploid, like for example some banana trees, grapevines and molluscs. These organisms are mostly sterile because they produce nearly no gametes. a) Make a drawing showing the chomosomes of a triploid cell where n = 2. b) Make a diagram showing how a triploid individual can be produced.arrow_forwardA large plant arose in a natural population. Qualitatively,it looked just the same as the others, except much larger. Is it more likely to be an allopolyploid or anautopolyploid? How would you test that it was a polyploid and not just growing in rich soil?arrow_forwardA) Give the diploid number of this organism. B) Is it mitosis or meiosis? Give two (2) elements on which you base your reasoning. C) Identify this mystery phase of the cell cycle. D) How many daughter cells will be produced at the end of the process and how many chromosomes (in numbers) will they contain? E) How does this process ensure the genetic variability of individuals of the species? Your answer must be based on two (2) different elements.arrow_forward
- If 50% of gametes produced by a double heterozygote are recombinant, then Group of answer choices d) either a or b could be true a) the two genes of interest are 50 map units apart e) either a or c could be true b) the two genes are on separate chromosomes c) the two genes both exhibit complete dominancearrow_forwardWhich of the following represents things that are equivelant? A) Two alleles for the same gene in a homologous chromosome pair B) The sequence of DNA in the two sister chromatids of a chromosome after meiosis 1 C) The number of homologous chromosomes per cell before and after meiosis 1 D) The number of chromosomes in each of the four daughter cells after meiosis 2arrow_forwardThe diagram below shows a cell during Meiosis II: a) What phase of Meiosis II is the cell in? How do you know? b) Assuming all of the chromosomes present during Meiosis II are shown in the figure above, how many chromosomes (counting homologous pairs as two chromosomes) does a gamete from this organism have? c) Draw the same cell during the same phase of Meiosis I. Label the elementsarrow_forward
- Which of the ff. statements is NOTtrue: A) Euploid is a good set of chromosome number B) Monosomies are typically phenotypically normal than syndromic C) Down syndrome can result from either a trisomy or a translocation D) Polyploids in humans are nearly always lethalarrow_forwardWhat is the key difference between autopolyploidy and allopolyploidy?arrow_forwardContrast the origins of autopolyploids and allopolyploids.arrow_forward
- If nondisjunction occurs in humans for one pair of homologous chromosomes during meiosis I. The other pairs segregate normally. a) Will any normal gametes result? b) How many chromosomes will each human gamete have? If nondisjunction occurs in humans for sister chromatids during meiosis II. The other pairs segregate normally. a) Will any normal gametes result? b) How many chromosomes will each human gamete have?arrow_forwardHow is aneuploidy different from polyploidy? What are the mechanisms by which aneuploidy and polyploidy are caused, and what are the consequences of these chromosomal alterations in terms of survival and fertility of the offspring? Edit View Insert Format Tools Tablearrow_forwardIn linkage mapping, how do we measure the distance between genes on a chromosome? options: A) The number of gametes used is proportional to the percent recombination in offspring. B) The number of offspring produced is equal to the percent recombination during crossover. C) The number of chromosomes resulting from crossover is equal to the distance the genes are apart in any one gamete. D) The percentage of recombinant offspring is directly proportional to how far apart the genes are on the chromosome.arrow_forward
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