Cytogenet Cell Genet 86:271-276 (1999)     276 Cytogenetics and Cell Genetics
large subcentromeric negative band (11) followed by three large positive bands equally distributed (12, 14 and 16). These are separated by two narrow negative bands (13 and 15). A negative telomere (17) is not always visible.

Chromosome 7

7-1. P arm

One region. 2 G-bands; a subcentromeric negative band (11) followed by a positive telomere (12). 2 R-bands; a subcentromeric positive band (11) followed by a negative telomere (12).

7-2. Q arm

One region. 6 G-bands; a subcentromeric negative band (11) followed by a narrow positive band (12), a narrow negative band (13), and a large positive band (14). Bands 12 and 14 are often joined. A narrow negative band (15) is followed by a large positive telomere (16). 6 R-bands; a subcentromeric positive band (11) followed by two large positive bands often joined (13 and 15). Two narrow negative bands (12 and 14) separate the positive bands. There is a negative telomere (16) not always visible.

Chromosome 8

8-1. P arm

One region. 3 G-bands; a subcentromeric positive band (11) followed by a negative band (12) and a positive telomere (13). 2 R-bands; a subcentromeric positive band (11) followed by a negative telomere (12).

8-2. Q arm

One region. 3 G-bands; a subcentromeric negative band (11) followed by a prominent positive band (12, often showing two sub-bands) and a large negative telomere (13). 4 R-bands; a subcentromeric negative band (11) followed by positive band (12), a negative band (13) and a positive telomere (14).

Chromosome Z

Z-1. P arm

Two regions. 7 G-bands; Region 1 has two prominent positive bands (11 and 13) separated by a narrow negative band (12). Region 2 is set off from region 1 by a prominent negative band (21). There are two positive bands (22 and 24) separated by a narrow negative band (23). 7 R-bands;

Region 1 has a subcentromeric negative band (11) followed by a positive (12) and negative band (13). A prominent central positive band (21) sets off region 2; bands 21 and 23 are equal width positive, 22 is a narrower negative band, with a negative telomere (24).

Z-2. Q arm

Two regions. 8 G-bands; Region 1 has a subcentromeric negative band (11) and three positive bands (12, 14 and 16) separated by 2 narrow negative bands (13 and 15). Bands 14 and 16 are often joined in more condensed chromosomes. Region 2 has a prominent negative band (21) in the distal half of the chromosome terminated by a narrow positive telomere (22). Band 21 is the characteristic large heterochromatic region (5. in the General section above). 7 R-bands; Region 1 contains two large positive bands: one subcentromeric (11), and one central (13), separated by a narrow negative band (12). A narrow negative band (14) is followed by a wide positive band (21) which begins Region 2. Band 21 is followed by a negative band (22) and a positive narrow telomere (23) not always visible.

Chromosome W

W-1. P arm

One region. 4 G-bands; a negative subcentromeric band (11) followed by two positive bands (12 and 14) that are separated by a narrow negative band (13). 3 R-bands; two small positive bands, one of which is subcentromeric (11) and the other of which is telomeric (13), separated by a narrow negative band (12).

W-2. Q arm

One region. 4 G-bands; a subcentromeric negative band (11) followed by a positive band (12) and a narrow negative band (13); a positive telomere (14). 3 R-bands; two positive bands (11 and 13) separated by a narrow negative band (12).

Acknowledgments

Appreciation is expressed to L. Korpiewski and D. Swiatek for assistance in preparation of the idiograms.

 
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