DNA, Chromosomes and Genes

Topic Page

Questions

• Why is the number of chromosomes an organisms has an even number?
• Why are chromosomes important to heredity?
• Why is DNA called the blueprint of life?
• How do genes differ from chromosomes?
• How can chromosomes be damaged?
• How does DNA code for proteins?
• How are chromosomes related to chromatin?
• What is dna?
• How are alleles and traits related?
• What is chromatin?
• How does chromatin pack into DNA?
• What are telomeres and why are they important?
• How does the antiparallel structure of the double helix affect replication?
• If a DNA strand has 45 cytosines how many adenines does it have?
• If a DNA strand has 35 cytosines how many adenine are there?
• If a DNA strand has 30 guanines how much thymine does it have?
• If a strand of DNA has 15 cytosines how many thymine will there be?
• What are the nitrogen bases in a DNA molecule?
• Why are homeobox genes similar in all organisms?
• Question #24068
• Question #24070
• Question #80e80
• How do chromatin and chromosomes relate to dna?
• What are chromatin and chromosomes made from?
• What is DNA made of?
• What do the letters in DNA stand for?
• Who discovered DNA?
• Who were the major people involved in determining the structure and function of DNA? What roles did they play?
• What is cDNA? How is it used in cells?
• What is the carbon skeleton for purine and pyrimidine?
• What functions does DNA serve in your body?
• How can DNA be extracted from saliva?
• If you were to view DNA under the classroom microscope would you be able to see any of the fine detail of the double helix structure? Why or Why not?
• How do chromatin and chromosomes differ?
• How many strands make up a dna double helix?
• Question #da84f
• Question #1f21f
• Are all mutations in DNA harmful?
• DNA is made up of genes or genes are made up of DNA?
• What is a gene?
• What role do genes play in inheritance?
• Within a DNA molecule, which nitrogen base pairs with cytosine (C)?
• How does evolution change DNA?
• Which strand of DNA has the same nucleotide sequence as mRNA?
• What is the difference between a genotype and a chromosome?
• What kinds of proteins make up the mitotic spindle?
• Are chromosomes visible during interphase?
• How would you describe the structure and function of centrioles?
• During which stage of mitosis do chromosomes duplicate?
• What is the main function of microtubules in the cell?
• What is the end result of mitosis and meiosis?
• Is DNA single stranded?
• What is gene expression and DNA replication?
• Is chromatin the same as a chromosome?
• What is the difference between a sister chromatid and a non-sister chromatid?
• How many chromatin are in one chromosome?
• Does chromatin consist of nucleosomes or do nucleosomes consist of chromatin?
• Is chromatin a DNA strand not yet in the form of chromosomes?
• How many chromosomes are present in a cell during interphase?
• What are monogenic traits?
• How would the structure of a fish's DNA compare with the structure of a lion's DNA?
• How are DNA, chromosomes, genes, and alleles related?
• Why are DNA, chromosomes, and genes related to one another?
• How do chromosomes, genes and DNA determine a person's characteristics?
• What protects chromosomes from degradation and why?
• What are chromosomes?
• DNA and RNA differ in all BUT one of the following ways?
• How do you insert a gene into a plasmid?
• What are the monomers of DNA and RNA?
• What is the role of DNA?
• Does every cell of human body have the exactly same DNA in nucleus, without exception?
• How are genes organized on a chromosome?
• What does it mean for a gene to be highly conserved?
• What are cell inclusions?
• DNA is made up of phosphate groups, nitrogen bases, and what?
• Question #f6231
• Question #e0cf1
• Why is nucleic acid called an acid?
• If there are 23 pairs of chromosome in a human cell, then does that mean that there are billions of chromosomes in our body since there are billions of cells?
• Are there chemical formulas for singular genes within DNA?
• What is the potential use of a map showing the sequence of DNA bases in a human chromosome?
• What compounds are the building blocks of DNA macromolecules?
• Adenine, guanine, cytosine, and thymine are the four nitrogenous bases present in the DNA of all organisms. Which scientist discovered these bases?
• Question #7b381
• Who is credited with creating the first accurate model of DNA?
• How many bases are in an anticodon?
• How is the hereditary information in DNA coded and passed from generation to generation?
• How many sex chromosomes does the normal human female inherit from her mother?
• What forms the backbone of the DNA molecule?
• What does a DNA molecule look like?
• What does it mean if the allele frequency in a population consistently changes?
• What structure stores DNA and genetic information for the cell?
• What is the role of fibers as a source of evidence in forensic investigations?
• How long is the human DNA?
• How does mRNA leave the nucleus?
• Question #a018b
• What sequence of DNA bases bonds with the DNA base sequence ATGT?
• Question #c3628
• What term defines a gene made up of two different alleles?
• How is the DNA different in eukaryotic and prokaryotic cells?
• Question #f9c90
• What 3 codons act as termination signals?
• What is a major difference between DNA replication and DNA transcription?
• What is chromatin? Does it compose the chromosomes?
• What is the difference between a homologous chromosome and a tetrad?
• Does Watson and Crick's model of DNA account for the equal amounts of thymine and adenine in DNA?
• How much (length) of DNA is in every cell?
• Red-green color blindness is inherited as an X-linked recessive. How can a man with normal color vision father a daughter who is red-green color blind?
• Question #fe698
• How many amino acids can a sequence of 24 DNA bases code for?
• How is all the information contained in the DNA molecule able to fit in the nucleus?
• What is the difference between homologous chromosome and homomorphic chromosome?
• How are genes present in a chromosome.?
• Question #2028f
• The length of the minimum unique stretch of DNA sequence that can be found only once in a 3 billion base pairs long genome is ?
• What is the smallest unit of DNA?
• What 3 molecules make up a nucleotide?
• What does semiconservative mean in the context of DNA?
• Question #6069c
• Question #6b0b0
• Question #68bd5
• Q.How can the problem of DNA doubling be solved to maintain the consistency of genetic material throughout the species??? Plz help
• During which stage of a cells cycle do the replicated chromosomes thicken and become visible?
• Question #16c23
• Question #1eeb9
• Question #c0f23
• What kind of DNA fragments could reach positive end of gel during electrophoresis?
• How does the environment affect gene expression?
• What are translocations in biology?
• What is the difference between an intron and an exon?
• What enzyme is required to make copies of DNA from RNA?
• Are the genes made of DNA?
• What is an allele and how is it different from a trait?
• What is the relationship between a species' number of chromosomes and the sizes of the individual organism?
• Question #044c6
• How are amino acid sequences related to DNA?
• Why can't the essential amino acids be produced in the body even though they are coded by the DNA?
• How does DNA base pairing work?
• Question #5d8f8
• Question #80dc2
• How does positive supercoiling of DNA occur?
• Question #21eac
• What are constitutive heterochromatin and facultative heterochromatin?
• Question #59aae
• The "rungs" of the DNA ladder are made of what?
• How many chromosomes would the sex cells of an organism with #12# chromosomes have?
• Question #f5cf9
• Who discovered the molecular structure of DNA?
• What makes a genetic code? How are they common to all organisms?
• Question #23189
• Barbara has curly hair. Her genotype for this trait is CC. What do you infer from this?
• A replicated chromosome consists of two identical structures known as what?
• Why do developmental scientists believe that the male sex is associated with a higher cumber of sex-linked inherited disorders?
• Question #d12f8
• What are genes for specific traits composed of?
• What type of bonds holds the bases together in DNA?
• A fruit fly has diploid cells with 8 chromosomes. How many chromosomes are in its haploid gametes?
• Blood type is considered to be class evidence. Although it may not specifically identify the suspect, explain how it still could be useful in helping to investigate a crime?
• If a DNA double helix is 100 nucleotide pairs long and contains 25 adenine bases, how many guanine bases does it contain?
• Question #da8d2
• During which phase do homologous chromosomes separate?
• Are adenine and guanine purines or pyrimidines?
• What are the repetitive sequences at the end of many chromosomes called?
• Question #07658
• Question #2bf92
• Question #b9b94
• Question #bd5f3
• If a species has 35% adenine in its DNA, what is the percent of the other three bases?
• What do you call chromosomes that have the same length and carry genes for the same traits?
• Question #e336c
• Many chromosome mutations result when chromosomes fail to separate properly during what process?
• What bases would pair with TGACTA?
• How many chromosomes are in a cell?
• Question #151c8
• Question #9b4f7
• What is an allele?
• Amino acids are the building blocks of DNA? True or false?
• Question #d03f1
• If you have a strand of DNA in which 20% of the bases are adenine, what percentage of guanine do you have?
• Which of the following is the most disorganized? A. sister chromatid; B. chromatin; C. double helix; or D. chromosome
• What forms the double helical structure?
• Why is the number of chromosome in a zygote diploid?
• What are the four bases of DNA?
• What is an example of allele?