Published: Mon, 13 Mar 2017 11:57:20 +0000
2017-03-13T11:57:20ZWomen have a longer life expectancy than men. A major reason for this is due to differences in genetic make-up between men and women.
2017-03-13T11:57:20ZMendel's Law of Segregation states that allele pairs separate during gamete formation, and randomly unite at fertilization.
2017-03-13T11:57:20ZAnimal cells are eukaryotic cells that contain various membrane-bound organelles.
2017-03-13T11:57:20ZDefinition of the term incomplete dominance. Learn how incomplete dominance differs from co-dominance and how they are studied in snapdragon plants.
2017-03-13T11:57:20ZMendel's law of independent assortment states that allele pairs separate independently during the formation of gametes.
2017-03-13T11:57:20ZThis stage-by-stage guide to the phases of meiosis provides details about the events that occur in each of the stages of meiosis I and meiosis II.
2017-03-13T11:57:20ZGlycolysis is the process of breaking down glucose into two molecules of pyruvate. It produces ATP and is the first stage of cellular respiration.
2017-03-13T11:57:20ZThe cell membrane is a thin, semi-permeable barrier that surrounds and encloses the contents of a cell. It supports and helps maintain a cell's shape.
2017-03-13T11:57:20ZA chromosome mutation causes changes in the structure or number of chromosomes in a cell. These mutations are often caused by errors that occur during the process of cell division or by mutagens.
2017-03-13T11:57:20ZThe Cell Theory is one of the basic principles of biology. It states that all living things are composed of cells and cells are the basic units of life.
2017-03-13T11:57:20ZA plant cell is a eukaryotic cell, meaning that it possesses a membrane-bound nucleus. Learn about the structures and organelles that can be found in typical plant cells.
2017-03-13T11:57:20ZCellular respiration is a process by which cells harvest the energy stored in food. It includes glycolysis, the citric acid cycle, and electron transport.
2017-03-13T11:57:20ZThe cardiac cycle describes the cycle of events that occur when the heart beats. It consists of a diastole phase and a systole phase.
2017-03-13T11:57:20ZThis resource provides information on brain anatomy, brain divisions, cranial nerves, the central nervous system, and brain function.
2017-03-13T11:57:20ZAn allele is an alternative form of a gene. Organisms typically have two alleles for a single trait, one being inherited from each parent.
2017-03-13T11:57:20ZNucleic acids are organic molecules that allow organisms to transfer genetic information from one generation to the next. DNA and RNA are the two types of nucleic acids.
2017-03-13T11:57:20ZThis guide to the phases of mitosis explores hows cells reproduce. In mitosis, chromosomes are duplicated and divided evenly between two cells.
2017-03-13T11:57:20ZPlant and animal cells are similar in that both are eukaryotic cells. However, there are several important differences between these two cell types.
2017-03-13T11:57:20ZLiving organisms are classified into one of six Kingdoms of life. They are placed into these categories based on common characteristics.
2017-03-13T11:57:20ZDid you know that cute features such as dimples and freckles are caused by gene mutations? These traits can either be inherited or acquired.
2017-03-13T11:57:20ZHeterozygous refers to having different alleles for a gene. Diploid organisms have two alleles for a gene that determine specific traits.
2017-03-13T11:57:20ZRed blood cells are blood components that transport oxygen throughout the body. These cells contain millions of oxygen-binding hemoglobin molecules.
2017-03-13T11:57:20ZThe body contains trillions of cells that come in varying shapes and sizes. Explore some of the different types of cells in the body.
2017-03-13T11:57:20ZMendel's law of independent assortment states that allele pairs separate independently during the formation of gametes. Therefore, traits are transmitted to offspring independently of one another.
2017-03-13T11:57:20ZThe cell nucleus is the command center of our cells. It contains our chromosomes and genetic information needed for the reproduction of life.
2017-03-13T11:57:20ZSex linked traits originate from genes found on sex chromosomes. Hemophilia is an example of a common sex linked recessive disorder.
2017-03-13T11:57:20ZDNA transcription is a process that involves the transcribing of genetic information from DNA to RNA. Genes are transcribed in order to produce proteins.
2017-03-13T11:57:20ZProteins are very important molecules in our cells. They are constructed from amino acids and each protein within the body has a specific function.
2017-03-13T11:57:20ZThe temporal lobes, one of four cerebral cortex lobes, play an important role in organizing sensory input, auditory perception, and memory formation.
2017-03-13T11:57:20ZConnective tissue supports and binds other tissues of the body. Examples of connective tissue include adipose, cartilage, bone, tendons, and blood.
2017-03-13T11:57:20ZHomozygous - A Genetics Definition. The term homozygous refers to individuals that have identical alleles for a given trait.
2017-03-13T11:57:20ZDefinition of Mendel's law of independent assortment.
2017-03-13T11:57:20ZThe cerebral cortex is the outer covering of the cerebrum. It is the layer of the brain often referred to as gray matter.
2017-03-13T11:57:20ZThe Three Domain System is a system for classifying biological organisms. Under this system, organisms are classified into three domains and six kingdoms.
2017-03-13T11:57:20ZThe cell wall is the rigid, semi-permeable protective layer found in some cells.
2017-03-13T11:57:20ZDNA replication is the process of copying the DNA within our cells. This process involves RNA and several enzymes, including DNA polymerase and primase.
2017-03-13T11:57:20ZBroca's area is one of the main areas of the cerebral cortex responsible for producing language. It controls motor functions involved with speech.
2017-03-13T11:57:20ZA capillary is an extremely small blood vessel located within the body tissues. Gasses, nutrients, and fluids are exchanged through capillaries.
2017-03-13T11:57:20ZDefinition of the term monohybrid cross.
2017-03-13T11:57:20ZThe following 10 facts about cells will provide you with well known and perhaps little known tidbits of information about cells.
2017-03-13T11:57:20ZBone marrow is the soft tissue found inside bones that functions mainly to produce red blood cells, white blood cells, and platelets.
2017-03-13T11:57:20ZThe cerebral cortex lobes include the parietal, frontal, occipital and temporal lobes. They are responsible for processing input from various sources.
2017-03-13T11:57:20ZThe structure of DNA is that of a double helix. Similar to a spiral staircase, DNA is twisted and coiled so that it can be packed into our cells.
2017-03-13T11:57:20ZSpecialized plant cells include parenchyma cells, collenchyma cells and sclerenchyma cells. Some cells store nutrients, while others support the plant.
2017-03-13T11:57:20ZA dihybrid cross is breeding experiment between organisms that differ in two traits. The parent organisms have different allele pairs for these traits.
2017-03-13T11:57:20ZHave you ever wondered why you have the same eye color as your parent? Traits are inherited by the transmission of genes from parents to their young.
2017-03-13T11:57:20ZThe diencephalon, along with the telencephalon comprise the two major divisions of forebrain. The thalamus is a major component of the diencephalon.
2017-03-13T11:57:20ZHomologous chromosomes are chromosome pairs that are inherited from each parent. They are similar in gene position but may contain different alleles.
2017-03-13T11:57:20ZThe central nervous system is responsible for processing information received from all parts of the body. The main organs are the brain and spinal cord.
2017-03-13T11:57:20ZThe frontal lobes are one of the four main lobes or regions of the cerebral cortex. They are responsible for the planning of complex cognitive behaviors.
2017-03-13T11:57:20ZThe amygdala is a brain structure responsible for autonomic responses associated with fear and fear conditioning. It processes many of our emotions.
2017-03-13T11:57:20ZDNA is a type of nucleic acid that contains the genetic information necessary for the production of other cell components and for the reproduction of life.
2017-03-13T11:57:20ZWhat is the relationship between chromosomes and sex? Sex is determined by the presence or absence of certain chromosomes.
2017-03-13T11:57:20ZPhotosynthesis is a process in which light energy is used to produce sugar and other organic compounds. Photosynthesis occurs in plant leaves.
2017-03-13T11:57:20ZTake a journey into the cell to find out about the cell structure and classification of both prokaryotic cells and eukaryotic cells.
2017-03-13T11:57:20ZProkaryotes are single-celled organisms that are the earliest and most primitive forms of life on earth. Prokaryotes include bacteria and archaeans.
2017-03-13T11:57:20ZThe limbic system is comprised of brain structures that are involved in our emotions. Structures of this system include the amygdala, hippocampus, hypothalamus, and thalamus.
2017-03-13T11:57:20ZThe nutrient cycle outlines the movement of chemical nutrients in the environment. Examples of these cycles include the carbon cycle and the nitrogen cycle.
2017-03-13T11:57:20ZA bacteriophage is a virus that infects bacteria.
2017-03-13T11:57:20ZThe thymus is a small glandular structure that regulates the immune system through the production of specific immune cells called lymphocytes.
2017-03-13T11:57:20ZThe corpus callosum is a thick band of nerve fibers that divides the cerebrum into left and right hemispheres.
2017-03-13T11:57:20ZRibosomes are cell organelles that consist of RNA and proteins. They are responsible for assembling the proteins of a cell.
2017-03-13T11:57:20ZEpithelial tissue covers the outside of the body and lines organs, vessels, and cavities. Epithelial cells are very closely packed together.
2017-03-13T11:57:20ZLymph nodes are specialized structures in the body that filter lymph fluid of harmful pathogens, cancer cells, and cellular waste.
2017-03-13T11:57:20ZSexual reproduction is a process by which two individuals produce offspring with genetic traits from both parents. It involves the union of gametes.
2017-03-13T11:57:20ZThe heart is the organ that helps supply blood and oxygen to all parts of the body. Heart anatomy focuses on the structure and function of the heart.
2017-03-13T11:57:20ZIf you are taking a biology course, you are going to write biology lab reports. Learn how to use a good lab report format to properly write a lab report.
2017-03-13T11:57:20ZWhat is biology? Simply put, it is the study of life. Discover the basic principles of biology and the characteristics of life.
2017-03-13T11:57:20ZAsters are star-shaped microtubule arrays found in animal cells. They help to form the spindle apparatus, which moves chromosomes during cell division.
2017-03-13T11:57:20ZThe circulatory system involves the circulation of blood which serves to move blood to a site or sites where it can be oxygenated, and where wastes can be disposed.
2017-03-13T11:57:20ZDue to its association with cardiovascular disease, cholesterol has been given a bad name. Although excess cholesterol levels can have a negative impact on the body, cholesterol is essential for a number of important functions.
2017-03-13T11:57:20ZA chloroplast is a chlorophyll containing organelle found in plant cells and some algae. They convert light energy into chemical energy by photosynthesis.
2017-03-13T11:57:20ZSister chromatids are two identical copies of a single replicated chromosome that are connected by a centromere and held together by special proteins.
2017-03-13T11:57:20ZMuscle tissue is the most abundant tissue type in most animals. The three types of muscle tissue in the body are cardiac, smooth, and skeletal muscle.
2017-03-13T11:57:20ZThe brainstem is the region of the brain that connects the cerebrum with the spinal cord. It consists of the midbrain, medulla oblongata, and the pons.
2017-03-13T11:57:20ZThe cytoskeleton is a complex network of fibers that function in cell support and movement. It shapes the cell and holds organelles in place.
2017-03-13T11:57:20ZSex chromosome abnormalities occur as a result of chromosome mutations brought on by mutagens or problems that occur during meiosis.
2017-03-13T11:57:20ZAbout the size of a pearl, the hypothalamus directs a multitude of important functions in the body. It is the control center for many autonomic functions.
2017-03-13T11:57:20ZProtein structure is determined by amino acids sequences. The four protein structure types are primary, secondary, tertiary, and quaternary structure.
2017-03-13T11:57:20ZThe human body is made up of several organ systems that work together as one unit. These systems are important for proper organism function.
2017-03-13T11:57:20ZThe principles that govern heredity were discovered by a monk named Gregor Mendel in the 1860's. One of these principles is now called Mendel's law of segregation.
2017-03-13T11:57:20ZTake the Heart Anatomy Quiz and find out how much you know about the heart.
2017-03-13T11:57:20ZSex cells are reproductive cells or gametes. Female ova are large and round, while male sperm are long and motile. Sex cells are formed by meiosis.
2017-03-13T11:57:20ZThe pineal gland is a small gland of the endocrine system that produces the hormone melatonin. This gland controls sleep-wake cycles.
2017-03-13T11:57:20ZGametes are reproductive cells that unite at fertilization to form a new cell called a zygote. Gametes are haploid cells formed by meiosis.
2017-03-13T11:57:20ZA gene mutation is any change that occurs in the DNA. These changes can be beneficial to, have some effect on, or be seriously detrimental to an organism.
2017-03-13T11:57:20ZNormal cells differ from cancer cells in a number of important areas. Mainly, cancer cells acquire the ability to proliferate uncontrollably.
2017-03-13T11:57:20ZThe cerebrum is the largest portion of the brain. It encompasses about two-thirds of the brain mass and lies over and around most brain structures.
2017-03-13T11:57:20ZNervous tissue is the primary tissue of the central and peripheral nervous systems. Nervous tissue conducts nerve impulses and is composed of neurons.
2017-03-13T11:57:20ZThe nucleus is a cell structure that contains hereditary information, or DNA, and controls cellular growth and reproduction.
2017-03-13T11:57:20ZProtein synthesis is accomplished through a process called translation. In translation, RNA and ribosomes work together to produce proteins.
2017-03-13T11:57:20ZA diploid cell is a cell that contains two sets of chromosomes. The somatic cells of the body are diploid cells that reproduce by mitosis.
2017-03-13T11:57:20ZCells divide either through the process of mitosis or meiosis. Sex cells are produced through meiosis, while all other body cell types are produced through mitosis.
2017-03-13T11:57:20ZAnalogous to the body's internal organs, organelles are tiny cellular organs that are specialized to perform functions necessary for normal cellular operation. Examples of organelles include the nucleus, mitochondria, and ribosomes.
2017-03-13T11:57:20ZThe thalamus is a limbic system structure that is involved in sensory perception and relaying sensory information to the cerebral cortex.
2017-03-13T11:57:20ZMitochondria are the cell's power producers. They convert energy into forms that are usable by the cell.
2017-03-13T11:57:20ZCellular respiration provides the energy needed to power cells. Find out how much you know about this process by taking the Cellular Respiration Quiz.