Question

Structural changes in chromosome biology discussion

Answer 1

Such change of structure is referred to as chromosomal aberrations or chromosomal mutations. (a) Changes in the number of genes in a chromosome: (i) Deletion or Deficiency: ... Duplication of chromosome may take place due to attachment of some deleted part of another chromosome with it.

Answer 2

Answer:

Chromosomes are the vehicle of hereditary material or genes. Any alteration, addition or deletion of chromosomal part leads to alteration of number, position or sequence of genes in the chromosome.

Such change of structure is referred to as chromosomal aberrations or chromosomal mutations.

Chromosomal aberrations involve two types of changes:

(i) Changes in number of genes in a chromosome

(ii) Changes involving arrangement of genes.

(a) Changes in the number of genes in a chromosome:

(i) Deletion or Deficiency:

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