trisome Cytology.
(ˈtraɪsəʊm)
[f. tri- + -some4.]
A chromosome which is represented three times in a chromosomal complement; also, a trisomic individual.
| 1921 [see disome]. 1926 L. W. Sharp Introd. Cytol. (ed. 2) xvii. 388 Such 2n + 1 forms are called ‘simple trisomic’ mutants; they have 11 disomes (normal pairs) and one trisome. 1944 [see monosome 1]. 1979 Nature 27 Sept. 280/2 The failure to form trisomes indicates..that on intact RNA3 stable ribosome binding does not occur simultaneously at both the site near base 29 and the site near base 70. |