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© 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk Karyotype images This PowerPoint.

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Presentation on theme: "© 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk Karyotype images This PowerPoint."— Presentation transcript:

1 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk Karyotype images This PowerPoint file contains a number of images of karyotypes that may be useful for teaching of genetics concepts. You may use these slides and their contents for non-commercial educational purposes.

2 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk total number of chromosomes, sex chromosome constitution, anomalies/variants. 46,XY 47,XX,+21 47,XXX 69,XXY 45,XX,der(13;14)(q10;q10) 46,XY,t(2;4)(p12;q12) 46,XX,del(5)(p25) 46,XX,dup(2)(p13p22) 46,XY,inv(11)(p15q14) 46,XY,fra(X)(q27.3) 46,XY/47,XXY The Karyotype: an international description

3 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk total number of chromosomes, sex chromosome constitution, anomalies/variants. 46,XY 47,XX,+21 Trisomy 21 (Down syndrome) 47,XXX Triple X syndrome 69,XXYTriploidy 45,XX,der(13;14)(p11;q11) Robertsonian translocation 46,XY,t(2;4)(p12;q12) Reciprocal translocation 46,XX,del(5)(p25) Deletion tip of chromosome 5 46,XX,dup(2)(p13p22) Duplication of part of short arm Chr 2 46,XY,inv(11)(p15q14) Pericentric inversion chromosome 11 46,XY,fra(X)(q27.3) Fragile X syndrome 46,XY/47,XXY Mosaicism normal/Klinefelter syndrome The Karyotype: an international description

4 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk Fig. 2.5 ©Scion Publishing Ltd Redrawn from ISCN 2005 with permission from S. Karger AG, Basel. Nomenclature of cytogenetic bands. The ideograms show ideal G-banding patterns at 550 band resolution. Major bands are labelled 1,2,3, etc., going from centromere to telomere. Major band 11q1 (11q means the long arm of chromosome 11, 11p the short arm) is divided into sub-bands 11q11 – 11q14, and at the highest resolution 11q14 splits into 11q14.1 – 11q14.3.

5 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk Fig. 2.9 ©Scion Publishing Ltd

6 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk Fig. 2.11 ©Scion Publishing Ltd Karyotype showing trisomy 21 (47,XX,+21)

7 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk Fig. 2.13 ©Scion Publishing Ltd Karyotype of Isabel Ingram. Although Isabel will never be able to have children normally, treatment with estrogens can allow her to develop normal secondary sex characteristics and greatly assist her personal and social life. Modern reproductive technology has allowed some Turner syndrome patients to bear children using donor eggs. Treatment with growth hormone can result in improved growth and final height.

8 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk Fig. 2.14 ©Scion Publishing Ltd G-banded karyotypes of Ellens chromosomes. There is a balanced translocation. Chromosomes 1 and 22 have exchanged segments (arrows). The translocation is described as 46,XX,t(1:22)(q25;q13)

9 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk Fig. 2.15 ©Scion Publishing Ltd G - banded karyotype of baby Elizabeth. She has inherited Ellens normal chromosome 1 but her translocated chromosome 22 (arrow). She is trisomic for the portion of chromosome 1 distal to 1q25, the translocation breakpoint, and monosomic for chromosome 22 distal to 22q13.

10 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk Fig. 2.16 ©Scion Publishing Ltd How the 1;22 translocation in Ellen Elliot originated. Chromosome 1 and 22 broke at the positions indicated by the arrows, and the cells DNA repair machinery rejoined the ends to form the two derivative chromosomes as shown. The derivative chromosomes are labelled der(1) and der(22).

11 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk Fig. 2.20 ©Scion Publishing Ltd A Robertsonian translocation. The inset shows how this common type of chromosome abnormality arises. The short arms of all the acrocentric chromosomes (13, 14, 15, 21, 22) contain similar DNA. Inappropriate recombination between two non-homologous chromosomes produces the fusion chromosome, which functions as a normal single chromosome in mitosis. The small acentric fragment comprising the two distal short arms is lost.

12 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk Fig. 4.14 ©Scion Publishing Ltd 22q11 metaphase FISH. The green spots are a control probe, used to identify the two copies of chromosome 22 and confirm that hybridization has taken place. The red spots are the TUPLE1 probe. Only one of the two copies of chromosome 22 contains the sequence that hybridizes to this probe.

13 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk Fig. 4.15 ©Scion Publishing Ltd Interphase FISH test for trisomy 21. The chromosome 21 probe is labelled with a red fluorochrome and a control probe (for chromosome 18) is labelled in green. The two green dots show that the hybridization has worked for this cell, and the three red dots show that there are three copies of chromosome 21. The clinical report is based on examining a large number of cells. For prenatal diagnosis a mix of differently coloured probes from chromosomes 13, 18, 21, X and Y is often used.

14 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk Fig. 4.16 ©Scion Publishing Ltd Array-CGH result on the patient shown in Figure 4.3. The whole genome was surveyed, but only results for the probes from chromosome 12 are shown. There is a duplication involving 39 contiguous clones from 12q24.1.

15 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk 47,XX,+21

16 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk 47,XX,+13

17 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk 47,XX,+18

18 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk 45,X

19 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk 47,XXY

20 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk 47,XYY

21 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk 45,XX,der(14;21)(q10;q10)

22 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk 46,XX,t(4;15)(q2?1.3;q13)

23 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk 46,XX,t(9;22)(q34;q11)

24 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk ish der(9)(ABL-),der(22)(BCRsp+conABLsp+,ABLsp+,BCRsp+)

25 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk 46,Y,fra(X)(q27.3)

26 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk Fragile X Chromosome

27 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk 47,XX,+?mar

28 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk 46,X,r(X)

29 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk ins(22;9)(q11;q13q34)

30 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk 46,XY.ish del(15)(q11.2q11.2)(SNRPN-)

31 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk 46,XY.ish del(15)(q11.2q11.2)(SNRPN-)

32 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk 46,XX.ish del(22)(q11.2q11.2)(TUPLE1-)

33 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk 46,XX.ish del(22)(q11.2q11.2)(TUPLE1-)

34 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk 46,X,del(X)(p21.1)

35 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk 46,XX,del(4)(p15.2p16.?2)

36 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk ish del(7)(q11.23q11.23)(ELN-) Williams syndrome

37 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk

38 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk Trisomy 21: 47,XX,+21 three separate copies of chromosome 21

39 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk Three copies of all the chromosomes: triploidy

40 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk Different chromosome banding resolutions can resolve bands, sub-bands and sub-sub-bands Chromosome 1 Human chromosome banding patterns seen on light microscopy

41 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk FISH - fluorescence in situ hybridisation

42 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk Example of FISH

43 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk Trisomy 21 amniocyte

44 © 2009 NHS National Genetics Education and Development CentreGenetics and Genomics for Healthcare www.geneticseducation.nhs.uk Chromosomes seen through a microscope


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