Disciplinary Core Ideas

Meiosis consists of one DNA replication and two nuclear divisions resulting in 4 daughter cells. The process which provides for genetic variation is crossing over. Crossing over occurs in the early stages when homologous chromosomes move together so that their chromatids form a tetrad. This is called synapsis and allows for the exchange of chromosome sections.

Each human being has something called DNA. DNA is described as genetics and an extremely long macromolecule that is the main component of chromosomes and is the material that transfers genetic characteristics in all life forms. DNA constructs of two nucleotide strands coiled around each other in a ladder like arrangement with the sidepieces composed of alternating phosphate and deoxyribose units and the rungs composed of the purine and pyrimidine bases adenine, guanine, cytosine, and thymine. Each chromosome consist of one continuous thread-like molecule of DNA coiled tightly around proteins and contains a portion of the 6,400,000,000 basepairs that make up your DNA.

While studying eugenics, genetics plays a detrimental role in determining heredity. Genetics is the study and behavior of genes ("Genetics"). These genes are encoded pieces of information that comes from both parents, these genes are found on any of the 23 pairs chromosomes; these chromosomes that contain genes form the human genome. 22 chromosomes all contain the same genes although slight variations of alleles, alleles are alternate forms of genes, and the 23rd chromosome contains the information for the zygote's gender.

Each cell contains the genetic coding that makes organisms function. A collection of similar functioning cells form tissues. Groups of tissues form organs, organs make systems and all of this together is the human body. Cells store DNA, which are the blueprints of the body. Humans have 46 chromosomes that come from parents; they create the genetic coding

b. S – Strands of dna within a chromosome separate from each other and complimentary strands are made.

Inside each and every cell in your body is a strange chemical called deoxyribonucleic acid, better known as DNA. DNA is a double-helix structure that is made up of billions of nucleotides. They are adenosine, thymine, cytosine, and guanine, abbreviated A, T, C, and G, respectively. “The information content resides in those chemical bases arranged within the interior, where A always pairs with T, and C always pairs with G” (Collins 6). These base pairs are lined up in a pattern as rungs on the DNA “ladder”. A gene is a section of base pairs in the strand of DNA. The smallest genes span about a few hundred base pairs, and the largest

Every person has his or her own unique sets of DNA. DNA is a molecule that holds the genetic instructions used in the growth, development, functioning, and reproduction of organisms. The DNA coding is needed to produce proteins. These proteins are needed to catalyze reactions for cell replication. Furthermore, multiple cells create different body systems in order to maintain homeostasis.

A chromosome is made up of genes, which is sort sections of DNA (Deoxynucleic acid) . Within the genes, there are alleles, which are different forms of a gene. For example the gene for eye colour has an allele for blue eyes and an allele for green eyes. Alleles can be either dominant or recessive. The characteristic controlled by a dominant allele develops if the allele exists

Students utilize articles to learn the aspects of waves that impact the earth’s crust in the form of earthquakes. Students simulate these waves using slinkies and calculate wave speed. Students also analyze the possible destructive forces of these waves.

Heritable traits are known to be passed from one generation to the next by DNA. This is a molecule that encodes genetic information. DNA is a long polymere with four types of interchangeable bases. The sequence of bases along a particular DNA molecule encodes the genetic information. Before a cell goes through mitosis and divides, the DNA is copied, so each of the two cells will inherit the DNA sequence. A portion of a DNA molecule that specifies a single functional unit is called a gene. Within cells, the long strands of DNA form condensed structures called chromosomes. The mutation for Tay Sachs Disease is located on chromosome 15. Organisms inherit genetic material from their parents in the form of homologos chromosomes, containing a unique combination of DNA sequences that code for

“Do not go gentle into that good night, / Old age should burn and rave at close of day; / Rage, rage against the dying of the light” (Thomas, 1951). These words spoke volumes when I first heard them in the motion picture, Interstellar. It can be interpreted in several different ways, however, to me, it simply means don’t give up. Don’t stop learning; don’t stop working. Rage against the obstacles, unfortunate circumstances, and the end of each day. Each day brings opportunities to accomplish something new or to progress on any tasks, projects, or goals. I try to keep this state of mind as I continue to go through life. Currently, my life consists of work, college, adult responsibilities, and leisure. I always grant myself time at the end of

Genes come in different varieties, called alleles. Somatic cells contain two alleles for every gene, with one allele provided by each parent of an organism. Genotype refers to the information contained in an organisms DNA, or genetic material. Its phenotype is the physical

All living organisms, from amoebas to humans, have a molecular code called DNA in their cells, which instruct the activities that keep the organism alive. DNA is made up of long, twisted strands of four molecular “letters” (A, T, G, and C), which pair up according to their complementary base pairs, and their order determines how proteins — the vital molecules that perform all the major tasks in our cells — are made. (Refer to Diagram 1 to help sum up the concept.)

We have seen that every species of life has a certain number of chromosomes in its somatic cells. These chromosomes exist in pairs. (Baserga Biology 98) The members of each pair are similar in size, shape, and hereditary contact. Man has a 23 pairs of chromosomes; frogs 13 pairs; and pea plants, 7 pairs. Suppose the egg and sperm cells had the same number of chromosomes as all the other cells in an organism. (Mitchison 95) If they united, the somatic cells in the off-spring of such a union would have twice the number of chromosomes they should have. (Baserga Biology 34) For example, human beings have 46 chromosomes in their somatic cells. If the father 's sperm cells and the mother 's egg cells also contained 46 chromosomes, their child 's somatic cells would have 92 chromosomes. The next generation would have 184, and so on. Thus the sex cells must have half the chromosomes found in somatic cells. This is accomplished by meiosis.

Chromosome- Chromosomes are the microscopic structure within cells that carries the molecule deoxyribonucleic acid. DNA is the hereditary material that influences the development and characteristics of each organism. In bacteria and bacteria-like organisms called archaebacteria, chromosomes are simple circles of DNA that float around in the cell. In more complex cells, or Eukaryotes, chromosomes are stored within a well developed and defined nucleus. In eukaryotic cells, chromosomes are highly complex structures in which the shape of the DNA molecules is linear, rather than circular. Chromosomes consist chiefly of proteins and DNA. Tiny chemical subunits called nucleotide bases form the structure of DNA. A sequence of these bases that are along a DNA strand will create a code for the production of a special protein also known as a gene. Genes occupy precise locations on the chromosome. Each cell contains enough DNA to form a thread extending about 2 m (about 7 ft). Proteins called histones play a key role in packaging DNA within chromosomes. Sections of