The a-b ridge counts on the palms of 480 normal Japanese (351 males and 129 females), plus samples of 25 Japanese with Klinefelter’s syndrome and 5 with Turner’s syndrome were studied. Increased numbers of sex chromosomes were associated with the reduced mean sum of the a-b ridge count.
Shiono, Hiroshi; Kadowaki, Junichi; and Tanda, Hitoshi
"The Palmar a-b Ridge Count and Sex Chromosomes,"
4, Article 10.
Available at: https://digitalcommons.wayne.edu/humbiol/vol47/iss4/10