Cyril Darlington pioneered plant cytogenetics in 1920–30 and made important advances in our understanding of mechanisms of chiasma formation and the behavior of sex chromosomes in meiosis [7].

Who invented the karyotype?

Lev Delaunay in 1922 seems to have been the first person to define the karyotype as the phenotypic appearance of the somatic chromosomes, in contrast to their genic contents.

When was the first karyotype?

Cytogenetics has been a key part of biology since 1842, when Swiss botanist Karl Nägeli first discovered chromosomes in pollen. In the decades since, the science has been defined as the study of chromosomes, including their behavior, mechanics, and role in inheritance.