Genetic principles and cytogenetics provide the framework for understanding how life encodes, replicates, and expresses its instructions. 1. Mendelian Principles (Classical Genetics)
Cytogenetics identifies abnormalities that lead to genetic disorders: Principles of Genetics and Cytogenetics
Not all genes are "on" at once; cells regulate expression based on environmental signals and developmental stages. 5. Modern Extensions which follows a maternal line.
Chemical modifications to DNA or histones that affect gene activity without changing the actual DNA sequence. 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
The inheritance of genetic material found in organelles like mitochondria or chloroplasts, which follows a maternal line.
