As the zygote goes through mitosis and creates more cells. Each cell is called a stem cell. In order to become a certain type of
cell, these cells will become Or This means they will turn Genes for the type of cell they are becoming, and turn Genes for the type of cell they won't be.
As the zygote goes through mitosis and creates more cells. Each cell is called a stem cell. In order to become a certain type of cell, these cells will become <u>differentiated </u>Or This means they will turn Genes <u>on </u>for the type of cell they are becoming, and turn Genes <u>off</u> for the type of cell they won't be.
Stem cells become specialized cells through the process of differentiation. The stem cells all have identical DNA in them. They become specialized for a particular function (s) through the process of differentiation. During this process, some <u>specific genes are either turned on or off</u>. <em>Cells in which the same genes are expressed become specialized for similar functions and can then come together to form a tissue.</em>
Crossing over – often, the sister homologous chromosomes of a cell exchange genetic material through recombination of genes.
Independent assortment/random fertilization – there are numerous variety of ways that the chromosomes of the gametes can combine, after meiosis, through fertilization to form a zygote
Mutation – on rare occasion, there is a slight and random change in the genes of a gametic cell caused by environmental factors.
<u>Photosynthesis</u> is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's metabolic activities.
