The position and size of heterochromatin in normal children is import ant factors to identify the genetic disease, congenital deformity and environmental effeets to genetic characteristics.
C-banded parts were measured by the polani-meter photoelectr...
The position and size of heterochromatin in normal children is import ant factors to identify the genetic disease, congenital deformity and environmental effeets to genetic characteristics.
C-banded parts were measured by the polani-meter photoelectrically. And this study found considerable high estmates(above 20% of total chromosome) for chromosome # 1, 9, 16, 19, 22, X and Y, 10%~19% for # 15, 17, 18 chromosomes, below 5% for chromosome # 2, 3 and 5%~10% for other chromosomes.