Species or F1 hybrid Root tip chromosome number The following table presents chromosome data on four species of plants and their F1 hybrids: Meiosis I Metaphase Number of Number of bivalents univalents A 20 10 0 B 20 10 0 C 10 5 0 D 10 5 0 A x B 20 0 20 A x C 15 5 5 AxD 15 5 5 Cx D 10 0 10 Deduce the chromosomal origin of Species A. Show clearly the basis of your answer by analyzing and diagramming the crosses given above. Distinguish between chromosomes and give chromosome number for individuals in the crosses mentioned above. From these crosses, diagram the cross that gave rise to Species A. b. How many bivalents and univalents would you expect to observe at meiotic metaphase I in a hybrid between species C and species B? c. How many bivalents and univalents would you expect to observe at meiotic metaphase I in a hybrid between species D and species B?

Species or F1 hybrid Root tip chromosome number The following table presents chromosome data on four species of plants and their F1 hybrids: Meiosis I Metaphase Number of Number of bivalents univalents A 20 10 0 B 20 10 0 C 10 5 0 D 10 5 0 A x B 20 0 20 A x C 15 5 5 AxD 15 5 5 Cx D 10 0 10 Deduce the chromosomal origin of Species A. Show clearly the basis of your answer by analyzing and diagramming the crosses given above. Distinguish between chromosomes and give chromosome number for individuals in the crosses mentioned above. From these crosses, diagram the cross that gave rise to Species A. b. How many bivalents and univalents would you expect to observe at meiotic metaphase I in a hybrid between species C and species B? c. How many bivalents and univalents would you expect to observe at meiotic metaphase I in a hybrid between species D and species B?

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter6: Cytogenetics: Karyotypes And Chromosome Aberrations

Section: Chapter Questions

Problem 1QP: Analyzing Karyotypes 1. Originally, karyotypic analysis relied only on size and centromere placement...

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In keeping with the style of Table 17-1, what would youcall organisms that are MM N OO; MM NN OO; MMMNN PP?
production) IN 3 DIFFERENT SPECIES, EACH WITH /TS OWN UMBER OE CHROMOSOMES * GONAD GERNM CELL DIVISION TE The drawings on the left represent stages in the two divisions of meiosis for a diploid cell in which N=2. In the other boxes in each row, draw the same stages in cells with the indicated chromosome SPECIES Y N=1 Part IV. Images SPECIES Z N=3 numbers. SPECIES X N=2 NAME the PHASE The events pictured in this row and the one below happen in both products of the first division cells * and the total number must be 2N (i.e 2 sets, one from each parent) because this can only Kappen in sexual species. Label: Homolgous chromosome Replicated chromosome Chromatid 10 Genome (think carefully for this) 2 Phases of Hhe 1stdivision of meiosis- 2 phases of the 2nd division of meiosis-
7.4 5577 20/ CV* 5. (a) Complete the following diagram to show the process by which gametes are formed. amand NOR NO devane 8 8. 072 404 PACLIGNO YOU Forsch chenyle VI SAMNING Zeytmos Lectopic of 12 mesecer in 200AU g Chor WERY IN 12120/ ZAINA Stage Act PE Stage B 2X P Stage C AUT2 Xyadden che d S www.w opov 02/01 88 8 us ml 151/3/0/00 COADCA CLAS Stage D Janis Stage E
Analyzing Karyotypes 1. Originally, karyotypic analysis relied only on size and centromere placement to identify chromosomes. Because many chromosomes are similar in size and centromere placement, the identification of individual chromosomes was difficult, and chromosomes were placed into eight groups, identified by the letters A to G. Today, each human chromosome can be readily identified. a. What technical advances led to this improvement in chromosome identification? b. List two ways this improvement can be implemented. c. What clinical information does a karyotype provide?
a Kemlan - Volum x O Maulina Kemlan - Perso X M Inbox (407) - kemlanm2 x G calculator - Google Sear x A Acellus: m/StudentFunctions/Interface/acellus_engine.html?ClassID=693717332 Unit 2 Exam Cell Division us m What type of cells are created during meiosis? A. diploid gametes B. haploid somatic cells C. haploid (reproductive) cells Using Alte Serve ht 2003 - 2021 Acellus Corporation. All Rights Reserved. Σ
An inversion heterozygote has the following inverted chromosome: Centromere ca a a A B CD JI HGF E, KL M Inverted region If a crossover occurred between genes H and I on one inverted and one normal chromosome, what would be the sequence of the dicentric chromosome before completion of metaphase I? A Cen B C D EFGHIJKL Cen M A Cen B C D JIHGFEKLM Cen JIH G F E Cen A Cen B C D JIHGFEDC B Cen A MLKEFGHIJKLM
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Please mathc the following So I can understand it _ monosomy trisomy anuploidy centromere _ gene sister chromatids _ diploid ___ Haploid _ (2) tetrad __ (11) telomere __ Chromosomes _ Chromatin _ allele 1. A duplicated chromosome is made of 2. A maternal and paternal chromosome present together, each with two sister chromatids 3. Semi-condensed DNA made up of coiled nucleosomes. 4. Super-coiled DNA strands. 5. Contains only one copy of each chromosome. 6. Name of an error during meiosis resulting in fewer chromosomes than normal in a zygote or individual (2n-1) 7. General term for an error resulting in the incorrect number of chromosomes in a gamete after meiosis 8. A specific version of a gene, such as blue eye colour 9. A region on a chromosome that codes for a protein 10. Region where…
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The plant Haplopappus gracilis has a 2n of 4. A diploid cellculture was established and, at premitotic S phase, aradioactive nucleotide was added and was incorporatedinto newly synthesized DNA. The cells were then removed from the radioactivity, washed, and allowed to proceed through mitosis. Radioactive chromosomes or chromatids can be detected by placing photographic emulsionon the cells; radioactive chromosomes or chromatids appeared covered with spots of silver from the emulsion.(The chromosomes “take their own photograph.”) Drawthe chromosomes at prophase and telophase of the firstand second mitotic divisions after the radioactive treatment. If they are radioactive, show it in your diagram. Ifthere are several possibilities, show them, too.
For each of the terms in the left column, choose thebest matching phrase in the right column.a. reciprocal translocation 1. lacking one or morechromosomes or having oneor more extra chromosomesb. gynandromorph 2. movement of short DNAelementsc. pericentric 3. having more than two completesets of chromosomesd. paracentric 4. exact exchange of parts of twononhomologous chromosomese. euploids 5. excluding the centromeref. polyploidy 6. including the centromereg. transposition 7. having complete sets ofchromosomesh. aneuploids 8. mosaic combination of maleand female tissue
Picture name - Tradescantia spathacea meiotic cell. HPO (400x)Shown below are photomicrographs of Rhoeo tradescantia cells undergoing meiosis. Answer the following question for each of the photomicrographs: Identify the cytogenetic abnormality observed (ex. ring, chain, laggard, bridge). Identify the meiotic stage in which these aberrations are observed (as shown in the photomicrograph). Explain how these aberrations are formed and relate to the possible causal mutation(s). Will this result to sterile and/or fertile gametes? Explain.