Genetics And Cytogenetics — Principles Of

The loss or gain of one or more chromosomes (e.g., Trisomy 21/Down Syndrome).

The foundation of genetics rests on Gregor Mendel’s laws of inheritance: Principles of Genetics and Cytogenetics

Genes for different traits are inherited independently of each other (provided they are on different chromosomes). The loss or gain of one or more chromosomes (e

Genes located close together on the same chromosome tend to be inherited together, defying independent assortment. Principles of Genetics and Cytogenetics

A two-step division reducing the chromosome number by half to produce haploid gametes, introducing genetic variation via crossing over . 3. Chromosomal Variations

Chemical modifications to DNA or histones that affect gene activity without changing the actual DNA sequence.

Having extra complete sets of chromosomes (common in plants).