You and Your Genes Revision Lesson 1
... • All living organisms are made of cells • Most cells have a nucleus • In the nucleus are chromosomes, made from DNA. ...
... • All living organisms are made of cells • Most cells have a nucleus • In the nucleus are chromosomes, made from DNA. ...
chromosome - Rossignols.net
... – Where did these genes come from? – What are the 2 forms of this gene called? What does diploid mean? What are the two halves of a single chromosome called? What structure holds the chromatids together? What is a gene? ...
... – Where did these genes come from? – What are the 2 forms of this gene called? What does diploid mean? What are the two halves of a single chromosome called? What structure holds the chromatids together? What is a gene? ...
371_section quiz
... of the disorder. A carrier is a person who a. does not have the disorder but can pass it on to offspring. b. can develop the disorder later in life but cannot pass it on. c. has a dominant normal allele that has been inactivated. d. passes the disorder to offspring on the Y chromosome only. 4. Genes ...
... of the disorder. A carrier is a person who a. does not have the disorder but can pass it on to offspring. b. can develop the disorder later in life but cannot pass it on. c. has a dominant normal allele that has been inactivated. d. passes the disorder to offspring on the Y chromosome only. 4. Genes ...
Meiosis
... The locus is the location for a gene on a chromosome. What is the difference between a somatic cell and a gamete? A somatic cell is any cell that isn’t involved in gamete production, and it is diploid. Gametes are reproductive cells that pass information to the next generation, and they are haploid. ...
... The locus is the location for a gene on a chromosome. What is the difference between a somatic cell and a gamete? A somatic cell is any cell that isn’t involved in gamete production, and it is diploid. Gametes are reproductive cells that pass information to the next generation, and they are haploid. ...
mitosis card game - Biology Junction
... Microtubules attach to kinetochore proteins on centromeres ...
... Microtubules attach to kinetochore proteins on centromeres ...
The Mechanism of X inactivation
... to segregate properly during anaphase • Meiotic nondisjunction can produce haploid cells that have too many or too few chromosomes – If such a gamete participates in fertilization • The resulting individual will have an abnormal chromosomal composition in all of its cells ...
... to segregate properly during anaphase • Meiotic nondisjunction can produce haploid cells that have too many or too few chromosomes – If such a gamete participates in fertilization • The resulting individual will have an abnormal chromosomal composition in all of its cells ...
LN 11Variation in Chromosome Number and Structure
... 3. understand how changes in chromosome number arise, as well as how such changes lead to genetic defects. 4. be able to distinguish between four major types of chromosome structural aberrations: (deletions, duplications, inversions, translocations). ...
... 3. understand how changes in chromosome number arise, as well as how such changes lead to genetic defects. 4. be able to distinguish between four major types of chromosome structural aberrations: (deletions, duplications, inversions, translocations). ...
Laboratory Midterm
... Laboratory Midterm Examination Chemistry of life Acid, Base, Buffer, pH Carbohydrates: Benedict's test for reduced sugars, Lugol's iodine test for starch Proteins: Biuret test for proteins Lipids: Sudan dye test Diffusion, osmosis, and solubility Diffusion, osmosis, permeability Tonicity: hypotonic, ...
... Laboratory Midterm Examination Chemistry of life Acid, Base, Buffer, pH Carbohydrates: Benedict's test for reduced sugars, Lugol's iodine test for starch Proteins: Biuret test for proteins Lipids: Sudan dye test Diffusion, osmosis, and solubility Diffusion, osmosis, permeability Tonicity: hypotonic, ...
Meiosis Powerpoint
... arrangement of pairs on either side of the spindle equator results in variation in the genotypes found in the ...
... arrangement of pairs on either side of the spindle equator results in variation in the genotypes found in the ...
Name: Biology I: Chapter 14 Guided Reading Chapter 12.4 When
... Disorders that happen among sex-chromosomes can also occur. In females nondisjunction can lead to _____________________________. A female with this disorder usually inherits only _______ X chromosome. These women are ____________ which means that they are unable to _________________. Their sex organ ...
... Disorders that happen among sex-chromosomes can also occur. In females nondisjunction can lead to _____________________________. A female with this disorder usually inherits only _______ X chromosome. These women are ____________ which means that they are unable to _________________. Their sex organ ...
Biology 3201 Cellular Reproduction Assignment
... What is a Centromere? • Centromere – The point at which two parts (sister Chromatids) of a chromosome join and at which the spindle fibers are attached during mitosis. Also called kinetochore. ...
... What is a Centromere? • Centromere – The point at which two parts (sister Chromatids) of a chromosome join and at which the spindle fibers are attached during mitosis. Also called kinetochore. ...
Chapter 10 / Chromosomes, Mitosis, and Meiosis I. Introduction
... 1. information for particular traits (e.g., eye color) is stored on regions of DNA called genes 2. concept of gene developed before exact structure of DNA was known 3. genes carry codes to make a single protein or many proteins 4. one or many genes may determine a particular trait 5. genes can be tu ...
... 1. information for particular traits (e.g., eye color) is stored on regions of DNA called genes 2. concept of gene developed before exact structure of DNA was known 3. genes carry codes to make a single protein or many proteins 4. one or many genes may determine a particular trait 5. genes can be tu ...
Meiosis vs Mitosis
... Meiosis is a form of nuclear division that reduces the number of chromosomes. It forms daughter cells that are genetically different from the parent cell, and they contain half the number of chromosomes. This division produces gametes, sperm and egg cells, in sexually reproducing organisms. It requi ...
... Meiosis is a form of nuclear division that reduces the number of chromosomes. It forms daughter cells that are genetically different from the parent cell, and they contain half the number of chromosomes. This division produces gametes, sperm and egg cells, in sexually reproducing organisms. It requi ...
Biology 122, Spring 2014 Activities for the week of March 10
... mutations in proto-oncogenes lead to tumor formation and why this can also be true for tumor suppressor genes. Also include an explanation as to why mutant oncogenes are dominant (only one copy of the mutant gene is capable of tumor promotion), whereas tumor suppressor gene mutations are recessive ( ...
... mutations in proto-oncogenes lead to tumor formation and why this can also be true for tumor suppressor genes. Also include an explanation as to why mutant oncogenes are dominant (only one copy of the mutant gene is capable of tumor promotion), whereas tumor suppressor gene mutations are recessive ( ...
Slide 1
... 2a. Know meiosis is an early step in sexual reproduction in which the pairs of chromosomes separate & segregate randomly during cell division to produce gametes containing 1 chromosome each. 2b. Know only diploid cells, spermatogonia & oogonia undergo meiosis. 2c. Know random chromosomal segregation ...
... 2a. Know meiosis is an early step in sexual reproduction in which the pairs of chromosomes separate & segregate randomly during cell division to produce gametes containing 1 chromosome each. 2b. Know only diploid cells, spermatogonia & oogonia undergo meiosis. 2c. Know random chromosomal segregation ...
Asexual vs Sexual Reproduction
... • Diploid cells are produced by mitosis • Mitosis is an asexual process. • We call these cells “2N” cells. • Examples would include: liver cells, etc. ...
... • Diploid cells are produced by mitosis • Mitosis is an asexual process. • We call these cells “2N” cells. • Examples would include: liver cells, etc. ...
Meiosis: Pre Test - Gulf Coast State College
... places, leaving a portion of one parent’s chromosome attached to the other’s chromosome. This is referred to as ___________________. A) Independent assortment B) Genetic recombination C) Karyotyping D) Cytokinesis 10. Nondisjunction, the abnormal separation of chromosomes during meiosis, may result ...
... places, leaving a portion of one parent’s chromosome attached to the other’s chromosome. This is referred to as ___________________. A) Independent assortment B) Genetic recombination C) Karyotyping D) Cytokinesis 10. Nondisjunction, the abnormal separation of chromosomes during meiosis, may result ...
1 - life.illinois.edu
... a. a single egg and three polar bodies. b. two eggs and two polar bodies. c. three eggs and a polar body. d. four eggs. 30. In animals most inherited simple mutations such as single base changes caused by DNA polymerase errors occur in the a. female germline because their mature eggs are retained f ...
... a. a single egg and three polar bodies. b. two eggs and two polar bodies. c. three eggs and a polar body. d. four eggs. 30. In animals most inherited simple mutations such as single base changes caused by DNA polymerase errors occur in the a. female germline because their mature eggs are retained f ...
Meisosis ppt
... • Cells that have ½ the normal number of chromosomes are called “Haploid” • Meiosis results in 4 Haploid cells that are genetically different from each other (and remember the parent cell was diploid) ...
... • Cells that have ½ the normal number of chromosomes are called “Haploid” • Meiosis results in 4 Haploid cells that are genetically different from each other (and remember the parent cell was diploid) ...
Mutations - Kaikoura High School
... immediately and properly repaired. • If they occur in somatic cells then they are non-inheritable, if in gametes then can be passed on to offspring. • Can be due to mistakes in DNA replication (spontaneous) or caused by mutagenic agents e.g. UV light, ionising radiation, Xrays, chemicals, viruses ...
... immediately and properly repaired. • If they occur in somatic cells then they are non-inheritable, if in gametes then can be passed on to offspring. • Can be due to mistakes in DNA replication (spontaneous) or caused by mutagenic agents e.g. UV light, ionising radiation, Xrays, chemicals, viruses ...
Why-do-cells
... Efficiency of moving materials into the cell – The larger the cell becomes the less efficient it is – The volume of the cell increases faster then ...
... Efficiency of moving materials into the cell – The larger the cell becomes the less efficient it is – The volume of the cell increases faster then ...
Chromosome
A chromosome (chromo- + -some) is a packaged and organized structure containing most of the DNA of a living organism. It is not usually found on its own, but rather is complexed with many structural proteins called histones as well as associated transcription (copying of genetic sequences) factors and several other macromolecules. Two ""sister"" chromatids (half a chromosome) join together at a protein junction called a centromere. Chromosomes are normally visible under a light microscope only when the cell is undergoing mitosis. Even then, the full chromosome containing both joined sister chromatids becomes visible only during a sequence of mitosis known as metaphase (when chromosomes align together, attached to the mitotic spindle and prepare to divide). This DNA and its associated proteins and macromolecules is collectively known as chromatin, which is further packaged along with its associated molecules into a discrete structure called a nucleosome. Chromatin is present in most cells, with a few exceptions - erythrocytes for example. Occurring only in the nucleus of eukaryotic cells, chromatin composes the vast majority of all DNA, except for a small amount inherited maternally which is found in mitochondria. In prokaryotic cells, chromatin occurs free-floating in cytoplasm, as these cells lack organelles and a defined nucleus. The main information-carrying macromolecule is a single piece of coiled double-stranded DNA, containing many genes, regulatory elements and other noncoding DNA. The DNA-bound macromolecules are proteins, which serve to package the DNA and control its functions. Chromosomes vary widely between different organisms. Some species such as certain bacteria also contain plasmids or other extrachromosomal DNA. These are circular structures in the cytoplasm which contain cellular DNA and play a role in horizontal gene transfer.Compaction of the duplicated chromosomes during cell division (mitosis or meiosis) results either in a four-arm structure (pictured to the right) if the centromere is located in the middle of the chromosome or a two-arm structure if the centromere is located near one of the ends. Chromosomal recombination during meiosis and subsequent sexual reproduction plays a vital role in genetic diversity. If these structures are manipulated incorrectly, through processes known as chromosomal instability and translocation, the cell may undergo mitotic catastrophe and die, or it may unexpectedly evade apoptosis leading to the progression of cancer.In prokaryotes (see nucleoids) and viruses, the DNA is often densely packed and organized. In the case of archaea by homologs to eukaryotic histones, in the case of bacteria by histone-like proteins. Small circular genomes called plasmids are often found in bacteria and also in mitochondria and chloroplasts, reflecting their bacterial origins.