Genetic Analysis: An Integrated Approach (2nd Edition)
2nd Edition
ISBN: 9780321948908
Author: Mark F. Sanders, John L. Bowman
Publisher: PEARSON
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Chapter 13, Problem 2P
For one set of chromosomes carried by a triploid plantspecies, assume the chromosome pair as one bivalent involving chromosomes
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Somatic cells in organisms of a particular diploidplant species normally have 14 chromosomes. Thechromosomes in the gametes are numbered from 1through 7. Rarely, zygotes are formed that containmore or fewer than 14 chromosomes. For each of thezygotes below, (i) state whether the chromosomecomplement is euploid or aneuploid; (ii) provideterms that describe the individual’s genetic makeupas accurately as possible; and (iii) state whether ornot the individual will likely develop through theembryonic stages to make an adult plant, and if so,whether or not this plant will be fertile.a. 11 22 33 44 5 66 77b. 111 22 33 44 555 66 77c. 111 222 333 444 555 666 777d. 1111 2222 3333 4444 5555 6666 7777
In the moss Polytrichum commune, the haploidchromosome number is 7. A haploid male gametefuses with a haploid female gamete to form a diploid cell that divides and develops into the multicellular sporophyte. Cells of the sporophyte thenundergo meiosis to produce haploid cells calledspores. What is the probability that an individualspore will contain a set of chromosomes all ofwhich came from the male gamete?
In the plant, Haplopappus gracile there is one long pair and one short pair of chromosomes. In the diagrams
below, anaphase of individual cells in meiosis or mitosis in a plant that is heterozygous for the genes, A and
B (which are on separate chromosomes) are shown. The lines represent chromosomes or chromatids and the
points of the "V" are the centromeres. For each case, indicate if the cell represents meiosis I, meiosis II,
mitosis, or impossible situation. Provide a brief (one sentence) reason for your decision.
1.
A
A
a
В
a
B
9.
A
a
B
A
a
2.
а
В
В
a
A
a
B
9.
B.
a
A
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Chapter 13 Solutions
Genetic Analysis: An Integrated Approach (2nd Edition)
Ch. 13 - Prob. 1PCh. 13 - For one set of chromosomes carried by a triploid...Ch. 13 - 10.8 If the haploid number for a plant species is...Ch. 13 - From the following list, identify the types...Ch. 13 - Mating between a male donkey (2n=64) and a female...Ch. 13 - Prob. 6PCh. 13 - Prob. 7PCh. 13 - What can we conclude about a mutational event...Ch. 13 - 9. In terms of the chromosome content of nuclei,...Ch. 13 - 10. In Drosophila, an X-linked recessive allele...
Ch. 13 - The plants in this problem are the same as those...Ch. 13 - A normal chromosome and its homolog carrying a...Ch. 13 - 10.12 A pair of homologous chromosomes in...Ch. 13 - 10.13 An animal heterozygous for a reciprocal...Ch. 13 - Dr. Ara B. Dopsis has an idea he thinks will be a...Ch. 13 - Suppose polymerase chain reaction (PCR) is used...Ch. 13 - Prob. 17PCh. 13 - A healthy couple with a history of three previous...Ch. 13 - A boy with Down syndrome (trisomy 21) has 46...Ch. 13 - Prob. 20PCh. 13 - 10.28 A small population of deer living on an...Ch. 13 - In humans that XX/XO mosaics, the phenotype is...Ch. 13 - 10.20 A plant breeder would like to develop the...Ch. 13 - In Drosophilia, seven partial deletion (1to7)...Ch. 13 - Two experimental varieties of strawberry are...Ch. 13 - 10.23 In the tomato, Solanum esculentum, tall ()...Ch. 13 - In Drosophila, the wild-type red eye color is...Ch. 13 - A DrosophilaPelement 2.5kb in length is modified...Ch. 13 - A biologist studying flight mechanisms in insects...Ch. 13 - 30. After reading Experimental Insight and...Ch. 13 - 31. Two NotI restriction enzymes cleave DNA on...Ch. 13 - For the following crosses, determine as accurately...
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- Meiosis is characterized by the pairing of homologouschromosomes during prophase I. In many species, an elaboratestructure called the synaptonemal complex forms betweenhomologues. During this pairing, homologues may exchangechromosomal material at sites called chiasmata. In meiosis I, thehomologues separate from each other, reducing the chromosomenumber to the haploid state (thus the reductive division). It isfollowed by a second division without replication, during whichsister chromatids become separated. The result of meiosis I and IIis four haploid cells. If sister chromatids separated at the first division, would meiosis still work?arrow_forwardEach sperm of a tomato plant contains seven chromosomes. What are the haploid and diploid number for tomatoes? haploid=7 and diploid=14 haploid=14 and diploid=7 haploid=7 and diploid=49 haploid=3 and diploid=7arrow_forwardSuppose that meiosis occurs in the transient diploid stageof the cycle of a haploid organism of chromosome number n. What is the probability that an individual haploidcell resulting from the meiotic division will have a complete parental set of centromeres (that is, a set all fromone parent or all from the other parent)?arrow_forward
- in the expermient of following chromosomal dna movement through meiosis, how many chromosomes were present when meiosis I started? How many nuclei are present at the end of meiosis ll? How many chromosomes are in each? What is the ploidy of the DNA at the end of meiosis l? What about at the end of meiosis ll? How are meiosis l and meiosis ll different? List two reasonarrow_forwardContrast the genetic content and the origin of sister versus nonsisterchromatids during their earliest appearance in prophase Iof meiosis. How might the genetic content of these change by thetime tetrads have aligned at the equatorial plate during metaphaseI?arrow_forwardTruffles (Tuber borchi) have 2n=8 chromosomes. For the mitotic and meiotic stages below, draw the chromosomes and chromatids, and give the number of homologous pairs, chromosomes, and chromatids present. Be sure to differentiate homologous chromosomes by using size, shape, or other labeling mechanism. Metaphase of mitosis ( # homologous pairs # chromosomes # chromatids Anaphase of meiosis II – draw and count chromosomes for only 1 cell ( # homologous pairs # chromosomes # chromatidsarrow_forward
- Assume that the autotriploid cell in has 3 n = 30chromosomes. For each of the gametes produced by this cell, give thechromosome number of the zygote that would result if the gamete fusedwith a normal haploid gamete.arrow_forwardIn experiment of Following chromosomal DNA movement through meiosis, what is the trial 1 and trial 2 meiotic division beads diagram for prophase l, metaphase l, anapahse l, telophase l, prophase ll, metaphase ll, anaphase ll, telophase ll, and cytokinesis?arrow_forwardSeed plants have the remarkable ability to bring male and female gametes together when conditions are dry. How is this possible?arrow_forward
- Arrange the following events of meiosis in the correct sequence * crossing over O synapsis terminalisation of chiasmata disappearance of nucleolusarrow_forwardA diploid fruitfy has 8 chromosomes. How many total chromosomes would be found in a monoploid fly?arrow_forwardAs shown gives the number of chromosomes in a haploid set of chromosomes. What is the lowest number in the table? What is the highest number? Most cells in plants are diploid, having two sets of chromosomes,so the number per nucleus should be doubled. How many chromosomes are present in each diploid potato nucleus? If a potato plant has 1 million cells, each with one diploid nucleus, how many chromosomes are present in the entire plant?arrow_forward
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