Meiosis is the process of copying, pairing and separating chromosomes to make reproductive cells such as eggs and sperm. Organisms that reproduce asexually use a form of cell division called mitosis to reproduce. *See Mitosis* Meiosis generally means a parent cell creating daughter cells. Because the cells divide twice, they end up with only 23… Continue reading Meiosis


Dominance (Genetics)

A dominant gene, or allele, simply means a gene that alters the phenotype in such a way that it masks the effects of another gene from the same locus. (A locus is the position of the DNA of a gene on a chromosome. The chromosomal locus is a series of numbers detailing the chromosome, arm,… Continue reading Dominance (Genetics)

Genetic Engineering

Genetic engineering is "the deliberate modification of the characteristics of an organism by manipulating its genetic material." In other words, it is now possible to alter the phenotype of an organism by changing its genetic code. Because DNA uses the same base-pairing principle and the same chemicals in all organisms, (A-T C-G) It is possible… Continue reading Genetic Engineering



Epigenetics is the study of external modifications to the genetic code, as well as their impacts and affects. It is “the study of changes in organisms caused by modification of gene expression rather than alteration of the genetic code itself.” Epigenetic processes such as methylation change the expression of genes, which changes the phenotype. When… Continue reading Epigenetics