___________ is an  abnormality where the chromosomes are incorrect.

__________is a picture of  a person's chromosome.

Chromosomes  come in pairs and they are called ___________.

Centromere present at the extreme end,  it is called ______________.

__________is a constricted region of a chromosome.

Diploid cells have _________homologous pairs.

__________ are the hereditary material of a cell.

Generally  chromosomes are ____________.

The _____________ bases are purine and  pyrimidines.

A DNA molecule is a large macromolecule consisting  of millions of nucleotides. Hence called as ___________.