Allele or Allelomorph. Chromatin. Chromosome. Chromatid. Gene. Genotype. Polygene. Phenotype. Allele a shorthand form of allelomorph, one of a series of possible ...
Studies of fruit-flies. Studied more intensively than any other species ... Gene of fruit-fly located in the X-chromosome. Arranged in genetic 'charting' order ...
A test cross between a long tailed cat and a no tailed cat is performed. ... Nettie Stevens makes the connection between gender and the X and Y chromosomes. 1905 ...