This presentation is aimed at undergraduate and graduate students and covers details of the structural and numerical aberration of chromosomes. The presentation will help easy understanding of the beginners.
40. ANEUPLOIDY TYPES
Nullisomy 2n - 2 Missing both copies of a homolog in a diploid
Monosomy 2n - 1 Missing one copy of a homolog in a diploid
Trisomy 2n + 1 Having an extra copy of one homolog in a diploid
Tetrasomy 2n + 2 Having two extra copies of one homolog in a diploid
Disomy n + 1 Having an extra copy of a homolog in a haploid
n = haploid number of chromosomes
2n = diploid number of chromosomes