Consider the following DNA sequence found on a different portion of the coding strand of Henry's CYP2C9 gene: TTACCGAGA a. What would be the sequence of the template strand on this portion of the gene? b. How many triplet codes does this DNA sequence contain? c. What would be the sequence of the mRNA after this sequence is transcribed?
Mitosis is the step during which the cell’s nucleus divides into two new nuclei. During mitosis, one copy of the DNA is distributed into each of the two daughter cells. Scientists divide mitosis into four parts (phases): prophase, metaphase, anaphase, and telophase. During prophase, the thread-like chromatin in the nucleus condenses to form double-rod structures called chromosomes. During metaphase, the chromosomes line up across the center of the cell.
(A 1 a, B 1 b, C 1 c, D 1 d). When crossing over occurs, the chromosomes will cross and the genes will be exchanged from one chromosome to another. (A 1 a, b1 B, c 1 C, D 1 d). Crossing-over occurs during meiosis I. 15.
Chromosomes are copied, DNA synthesized, Organelles manufactured, centrioles replicated, Now the cell’s ready to divide. Mitosis is S, and in it things are quick, Four phases together do the trick. Prophase, Metaphase, Anaphase, and Telophase In prophase, chromatids coil and chromosomes form, Centromeres holding duplicated chromosomes are the norm. Each coiled chromosome has two sister chromatids, Nucleus begins to disappear, centrioles moves out, and spindles created. Metaphase is the shortest stage.
DNA specifies the synthesis of proteins, However, a gene does not build a protein directly, instead it dispatches instructions in the form of RNA, which then programs protein synthesis. This molecular chain of command is from DNA in the nucleus then to RNA then to protein synthesis in the cytoplasm. The two main stages are transcription and translation, transcription is the transfer of genetic information from DNA into an RNA molecule, translation is the transfer of the information from RNA into a protein. Describe each stage of the flow of information starting with DNA and ending with a trait. Information will always start with DNA then it will travel to the RNA and then the protein.
The chromosomes condense and become visible Metaphase II- the chromosomes align down the center of the cell Anaphase II- the centromeres part and the separated sister chromatids move to opposite poles Telophase II- nuclear envelopes form, and cytokinesis then separates the nuclei into individual cell Crossing over- is a process in which two homologous chromosomes exchange genetic material Polyploid- an error in meiosis, gamete with one or more complete cells of extra chromosomes Nondisjunction- abnormality error, occurs when the chromosomes fail to separate at either the first or second meiotic
When the MRNA and tRNA bind the amino acid is deposited and binds with an adjacent amino acid forming a polypeptide chain and eventually (after modification by other organelles) forms a protein codes for proteins. A piece of DNA coding for a protein is called a gene. When the protein is produced, we say that the gene is expressed different form of the gene are called alleles which are codes which produce different proteins that lead to characteristics of an organism in general. Proteins are the expressed traits of organisms. Sometimes single proteins other times groups of proteins which account for the phenotype of an organism All organisms begin life a single cell.
These sister chromatids are then separated in anaphase as the spindle microtubules attaches to centromere and pulls the sister chromatids to opposite poles. As the sister chromatids separate they are called chromosomes. This means that each pole has the same chromosomes (same genetic material). Finally the microtubules break down, the chromosomes uncoil and the nuclear membrane reforms. The cell then divides into two daughter cells with genetically identical
Having two sets of chromosomes is known as (2n) _______diploid___________. ANSWER: 6. Eggs and sperm are _______haploid_________ (n). ANSWER: Next Give one characteristic of each of the following phases of Meiosis I. Prophase I: During prophase I, homologous chromosomes pair and form synapses, a step unique to meiosis Metaphase I: Bivalents, each composed of two chromosomes align at the metaphase plate Anaphase I: Each of the daughter cells is now haploid Telophase I: Nuclear envelopes may reform 7. Does the S phase (DNA replication) occur after Meiosis 1?
1) Prophase-In early prophase chromosomes appear, the nucleoli disappear and centromsomes separate from one another. In late prophase nuclear envelope breaks up allowing spindle o attach to chromosomes. 2) Metaphase- in this phase the two centrosomes are at opposite poles of cell and chromosomes are aligned in the middle. 3) Anaphase- in the third phase the centromeres of chromosomes split each chromatid and each one becomes a chromosome. 4)Telophase- final phase of mitosis, it starts as soon as chromosome movement stops, two identical set of chromosomes are at opposite poles of the cell, a nuclear envelope forms, nucleoli reappears, and the spindle disappears we are left with one cell and two identical nucleus.