Mitosis

Meiosis- A type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores. I have heard a lot about mitosis but not enough about meiosis. 5. Heterozygous-having dissimilar pairs of genes for any hereditary characteristic.Heterozygosity occurs when an individual has two different alleles of a gene. I've never heard of this word before. It's nice to learn…

a keratin proteins, which main purpose is to make our skin waterproof from hazard chemicals. These dead cells are constantly deteriorating from the surface of the skin. The cells on the base layer are really cuboidal shape. They are separated by mitosis to deliver a consistent supply of new cells that substitute the ones that have vanished from the surface. As these substitution cells are consistently pushed towards the surface, their shape changes. By the end of this phase the cells are now…

is the production of an ovum (egg) and it occurs in the ovaries. Oogenesis starts with the primary oocytes formation via oocytogenesis and it occurs before birth. In this process, a female germ cell oogonium (diploid 2n) undergo a cell division (mitosis) to make more oogonium and primary oocyte. During fetus development, the primary oocytes will purse in prophase I. After puberty begins, the primary oocytes (dipole 2n) undergoes meiosis I to create a secondary oocyte and a polar body, both a…

has a role in the G1 cell cycle which is held by the G1 cyclin-dependent kinases (CDKs) 4/6), in this manner, allowing access into the S-phase of the Cell Cycle. When the INK4A cell and the CDKs don’t bind, it can lead to a hyperphosphorylation, mitosis regulator, failure and that causes the cell cycle to just keep going without control. The melanoma mutation affects the cell checkpoints during the G1 and G2 Interphase steps. This causes the cell to lose control of division, and mutate, which…

Sickle cell disease is an inherited disorder that is caused by a mutation in the DNA sequences that codes for the beta chain of the hemoglobin protein. Red blood cells are, normally, flexible and round, but with the sickle cell anemia the red blood cells become sticky, rigid, and crescent shaped. The Hemoglobin protein carries oxygen in the red blood cells throughout the body. With the disease, the blood cell’s shape can cause them to get lodged in the blood vessels resulting in the obstruction…

across the membrane. Once the hormone has entered the cell and binded to its receptor, cytokinin stimulates the productions of proteins that are essential to mitosis. When the concentration of this proteins increases, it is more likely that there will be a favorable collision and a reaction will occur. In this way, cytokinin helps increase mitosis in growing regions of the plant. Similarly to Auxin, cytokinins also help with modifying apical dominance, but instead of promoting main stem growth…

According to the cell theory, the cell is the smallest form of life but there are many parts of a cell which allow the cell to do the job it is assigned correctly. An example of a cell would be the animal cell, which is a eukaryotic cell or a cell that contains a plasma membrane. Inside the membrane there are parts of the cell called the organelles. (Animal Cell Structure, 2005) Organelles inside the cell have specific jobs to perform for the cell, organelles include the ribosomes, vacuoles,…

Stratum basale: The stratum basale or stratum germinativum is a continuous layer which gives rise to keratinocytes. It is usually described as one cell thick .this is the base or bottom made of living cuboidal keratinocytes that undergo cell division (mitosis ) they also have melanocytes that make melanin( dark pigment ). 2. Stratum Spinosum: the stratum spinosum or prickle cell layer is so called because the cells are given a spiny appearance by the numerous desmosomes or attachment plaques at…

The significance of stem cells can be defined by two important characteristics: they are cells that aren’t specialized for any specific tissue undergoing the process of mitosis to renew themselves and within specific and controlled factors, the not unspecialized cells can be evolved into certain types of tissues through the process of differentiation (2009). Scientists have recently focused and researched on two types of stem cells found in humans and animals: embryonic stem cells and adult or…

ANALYSIS OF RESULTS: The limiting factor of area is the size of the polystyrene cup used in the experiment. Each of the polystyrene cups was the exact size in order to be able to determine how different amounts of fertilizer affected the duckweed growth. Hence, the factor of size could not be investigated as each different amount of fertilizer was exposed to the exact same area. This can be linked to the literature review that discusses how the area where it is growing affects duckweed growth.…