Some chromosome mutation terminology

monoploid: number of chromosomes in basic set (x)

euploid: organisms with multiples of monoploid number

normal euploidy:

haploid: one chromosome set for species

diploid: two chromosome sets for species

Polyploidy: more than two sets of chromosomes for species

triploid (3n); tetraploid (4n); pentaploid (5n); hexaploid (6n)

monoploid (1n): gametic number

"In most animals and many plants that we are familiar with, the haploid number and the monoploid number are the same. Hence, n or x (or 2n or 2x) can be used interchangeable." text page 250

wheat ...(Triticum aestivum; 2n= 6x= 42)..... has 42 chromosomes; it is hexaploid 6x); x = 7; 6 times 7 = 42; gametes have three genomes of 7 chromosomes each A, B, D.

2n = AA BB DD (6 times 7) = 42

Aneuploidy

nullisomic (2n - 2) for same chromosome

monosomic (2n - 1)

trisomic (2n + 1).... not to be confused with triploid (3n)

 

Somatic aneuploidy....page 264