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Polygenetic inheritance
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Who Controls Your DNA? Ever wondered what DNA is or who controls your DNA? Well, for one thing it’s not something that you could eat or wear. DNA is made up of molecules called nucleotides that contain a phosphate group, a sugar group and a nitrogen base. There are 4 types of nitrogen base and they are adenine, thymine, guanine and cytosine. These four bases are what determine DNA’s genetic code. It is crucial to know that DNA is inherited from both mother and father. In other words, DNA inherits 23 chromosomes from each parent which is a total of 46 chromosomes in you. That is how you are created because the 46 chromosomes hold the diagram for a human body. Despite the fact that you inherit 23 chromosomes from each parent it does not …show more content…
Each base are paired up together in order to create DNA. For example, in the article Base pairs it states “Attached to each sugar ring is a nucleotide base, one of the four bases Adenine (A), Guanine (G), Cytosine (C), and Thymine (T). The first two (A, G) are examples of a purine which contains a six atom ring and five atom ring sharing two atoms. The second two (C, T) are examples of a pyrimidine which is composed of a single six atom ring…” To clarify, this statement is trying to explain that when adenine is paired up with guanine it is an example of purine, but when cytosine is paired up with thymine it is an example of pyrimidine. Purine contains a six atom ring and a five atom ring that shares two atoms while pyrimidine contains a single six atom ring. The base pair is when “thymine is paired up with adenine and guanine is paired up with cytosine” as stated in the article Exploring the Molecules of Life: …show more content…
All humans have the same bases, structure, and components in their DNA, the only difference are the combination of the bases in our DNA. For example, in the article DNA and proteins are key molecules of the cell nucleus it states “In tetranucleotide block where the nucleotides can appear more than once and the order is random more than once and the order is random, there can be 256 possible combinations”. Another example is that in the slideshow DNA testing a look behind the genes it explains that a father can have brown eyes (BB) and a mother can have blue eyes (bb), but the child can have either of the eyes. It also shows that a father has wide brown eyes (BB) and a mother has wide brown eyes (BB), but the child has small brown eyes (BB). The last example that was shown in the slide show was that a father has small blue eyes (bb) and a mother has small blue eyes (bb), but the child has big blue eyes (bb). This is an example of what we call a recessive gene and a dominant gene. To clarify, all humans have the same bases, design and components, but every individual has different combinations in their DNA, which is what makes you
In 1990, the first great stride of genetics took place. This was called the Human Genome Project, a large-scale operation that was designed to understand the human genome (genetic structure). Since its commencement, there have been many leaps and bounds that have taken place. For certain genetic issues that we once knew nothing about, we no...
On a normal person, you have 23 pairs of chromosomes. In each pair, 1 gene comes from the mother, and 1 gene comes from the father. This is how things get passed down from parents to children (like eye color, height, skin tone etc...).
DNA is made up of nucleotides, and a strand of DNA is known as a polynucleotide. A nucleotide is made up of three parts: A phosphate (phosphoric acid), a sugar (Deoxyribose in the case of DNA), and an organic nitrogenous base2 of which there are four. The four bases are as followed: Adenine (A), Cytosine
The study of nucleic acids has now become a fruitful and dynamic scientific enterprise. Nucleic acids are of unique importance in biological systems. Genes are made up of deoxyribonucleic acid or DNA, and each gene is a linear segment, or polymer, of a long DNA molecule. A DNA polymer, or DNA oligonucleotide, contains a linear arrangement of subunits called nucleotides. There are four types of nucleotides. Each nucleotide has three components; a phosphate group, a sugar and a base that contains nitrogen within its structure. The sugar moiety in DNA oligonucleotides is always dexoyribose, and there are four alternative bases: adenine (A), thymine (T), guanine (G), and cytosine (C). The phosphate groups and the deoxyribose sugars form the backbone of each DNA stand. The bases are joined to the deoxyribose sugar and stick out to the side. Both oligomers, DNA and RNA, consist of 5’->3’ phosphodiester-linked nucleotide units that are composed of a 2’-deoxy-D-ribose (DNA) or D-ribose (RNA) in their furanose forms and a heteroaromatic nucleobase (A, T, G, and C; A, U, G, C), and the resulting oligonucleotide chain is composed of a polar, negatively charged sugar-phosphate backbone and an array of hydrophobic nucleobases. The amphiphilic nature of these polymers dictates the assembly and maintenance of secondary and tertiary structures the oligonucleotides can form. In the DNA duplex structure, genetic information is stored as a linear nucleotide code. This code can be accessed and replicated. RNA, or ribonucleic acid, is another structurally related essential biopolymer. RNA differs from DNA in having the sugar ribose in place of the deoxyribos...
What do Michael Phelps, Abraham Lincoln, Mary Queen of Scots, & Tutankhamen all have in common? Although these may seem like completely unrelated names, these are all people suspected of having Marfan’s Syndrome, a genetic mutation obtained through heredity. How does DNA (Deoxyribonucleic Acid) and its complex (structure) relate to inheritance of traits in organisms—especially in humans? DNA is inherited from ones biological parents, and is the basis of heredity. It contains the code for all of our attributes, including how they will form. DNA is composed of four different chemicals, otherwise knows as nucleotide bases—A, T, C, & G. DNA is found in chromosomes—and each offspring receives one chromosome from their mother and father (each). In DNA, there are genes— specific sequences that carry hereditary information and control he expression of this hereditary traits. Heredity is the expression of characteristics obtained form ancestor to descendant through the transmission of genes. Inconsistencies can occur in these genes, however. Environmental & hereditary agents cause changes in ...
Deoxyribo Nucleic Acid (DNA) is a chromosome found in the nucleus of a cell, which is a double-stranded helix (similar to a twisted ladder). DNA is made up of four bases called adenine (A), thymine (T), guanine (G), and cytosine (C), that is always based in pairs of A with T and G with C. The four bases of A, C, G, and T were discovered by Phoebus Levene in 1929, which linked it to the string of nucleotide units through phosphate-sugar-base (groups). As mention in Ananya Mandal research paper, Levene thought the chain connection with the bases is repeated in a fix order that make up the DNA molecu...
... have been doing a phenomenal job of figuring this out. DNA is the chemical in each cell that carries our genes. DNA is the source of just about everything. It not only determines what we look like, but also many other things. Instructions are on some of our genes to let them know when they need to multiply and divide. Cancers can be caused by DNA defects.
Besides physical appearance, genes give rise to distinct chemistries in various realms of the body and brain. Such differences sometimes make someone liable or inclined to particular diseases, and some dramatically affect the way a person will respond to medical treatments.
The PBS Epigenetics video (2007) also showcases another study conducted on identical twins, two human beings born of the same fertilized egg who have the same DNA. The study wanted to understand why twins can have identical DNA and still experience differences in their bodies’ growth and deve...
“The highest rated science program on TV called NOVA made a documentary surrounding genomic testing called, Cracking Your Genetic Code (NOVA, 2008).” This documentary demonstrated and described different techniques of what is genetic testing, how genetic testing is performed, and all the individuals whom benefit from these special DNA techniques. What is DNA? “DNA is material that governs inheritance of eye color, hair color and many other human and animal traits (Riley, 2005).” DNA is developed from the pairing of genes from a female and male gametes (Health & Prenancy, 2012). These gametes fuse together during mitosis and meiosis, getting 23 chromosomes from each parent, in order, to develop an embryo. In this embryo is DNA. DNA is made of 4 different amino acids, in which, are the building blocks for DNA and they are A, T, G, & C. These building blocks have base pairing in a series of sequences and this sequence is what makes up genes. Genes are codes that can read in this sequence to determine what kind of traits offspring is going to have. Through genes DNA testing can be perform to find mistakes. In this documentary, many different genetic testing were performed and some may agree that this can be very controversy because some people will rather not know certain things unless there are signs or symptoms. However, others find this DNA testing as an advantage and knowing this information can prepare them for the “what if” factor. In my research, I will be discussing what genetic testing is, what it provides, what the benefits are, the risks, and what companies provide genomic testing.
A chromosome is made up of two identical structures called chromatids. The process of nuclear division is called interphase; each DNA molecule in a nucleus makes an identical copy of itself. Each copy is contained in the chromatid and a characteristic narrow region called the centromere holds the two chromatids together. The centromere can be found anywhere along a chromosome but the position is the characteristic for a particular chromosome. Each Chromatid contains one DNA molecule. DNA is the molecule of inheritance and is made up of a series of genes. The fact that the two DNA molecules in the sister chromatids, and hence their genes, are identical is the key to precise nuclear division.
I thought that if we all had the same DNA, we would all look the same. Now, I understand that we all have the same DNA, but each organism’s DNA are activated at different
It was hypothesized that since the bases had a particular “partner”, DNA strands can have different sequences depending on the ultimate function of the DNA strand. While watching the TED Talk by James Watson, I found it interesting at how trying the entire process was of discovering DNA to figuring out
Dark colored hair is an example of a dominant gene. Recessive genes are less common and show up when both parents have the same gene. There are not as many Dominant or recessive
Most of our DNA is passed on as a pairs of chromosomes-half of each pair from the mother and half from the father. Each parent also has a special type of DNA that is exclusive to them that they then pass to their offspring. Mothers pass on Mitochondrial DNA, while Y-chromosome DNA is passed do...