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PowerPoint slides
PowerPoint slides

Cell Nucleus Quiz Answers
Cell Nucleus Quiz Answers

... b) The outside boundary of the nucleus. c) The nuclear covering that controls what’s inside the nucleus. d) A Bilayer that surrounds the nucleus. ...
GENETIC DISORDERS
GENETIC DISORDERS

... • Changes in chromosomes are known as mutations. • Mutations can be beneficial, neutral or harmful. • Because chromosomes are copied during interphase, all daughter cells (sperm or egg) will carry the mutation. ...
11–4 Meiosis - WordPress.com
11–4 Meiosis - WordPress.com

... are VERY different!  Mitosis produces two genetically identical diploid somatic cells  Meiosis produces four genetically different haploid sex cells ...
A Genomic Timeline
A Genomic Timeline

... Genomc Research journal inititated by Cold Spring Harbor Laboratory Press Mary-Claire King finds evidence that a gene on chromosome 17 causes an inherited form of breast cancer and increases the risk of ovarian cancer. ...
Characteristics of linked genes
Characteristics of linked genes

... The genes for wing size and body color were so commonly inherited as only two combinations either gray body/normal wing or black body/small wing that they had to be … • on the same chromosome! • This indicated that the genes for body color and wing size were… • LINKED onto one chromosome. ...
FREE Sample Here
FREE Sample Here

... Meiotic anaphase II more closely resembles mitotic anaphase by the two criteria cited above. 28. During gamete formation, the 23 pairs of human chromosomes independently assort, creating gametes that are genetically different. For example, one gamete may have 10 paternally derived chromosomes and 13 ...
Genetic recombination
Genetic recombination

... Normal phenotypic polymorphism Different reaction to environment (drugs, food, toxins...) Susceptibility to infections Predisposition to diseases (cancers, diabetes...) Abnormal phenotypic polymorphism ...
Genetics Vocabulary Note-Taking Chart
Genetics Vocabulary Note-Taking Chart

... You ________________ one allele from a trait occupy the your ______________ and one from your _____________________ on homologous _____________ for each trait. chromosomes. Dominant, n. An inherited trait which is present even ______________ eye color is dominant when inherited _________ from one ov ...
Exam 1
Exam 1

... Multiple choice section: (15 points total – 3 per question) ...
The ultrasound detection of chromosomal anomalies
The ultrasound detection of chromosomal anomalies

... cells of the body that contains two sets of chromosome the cells are called diploid Chromosome are displayed in a karyotype in order or decreasing size, with the small arm “p” on top and the longer arm “q” at the bottom. The last pair of chromosome represented in a karyotype is the sex chromosomes. ...
Unit 6: Genetics
Unit 6: Genetics

... Tt ...
genetics study guide
genetics study guide

... Address the Learning Objective Below: Sexual reproduction (Define sexual reproduction as the process involving the fusion of haploid gametes to form a diploid offspring and the production of genetically dissimilar offspring Meiosis  Define meiosis as reduction division in which the chromosome numbe ...
chromosomes - Ms. Dooley`s Science Class
chromosomes - Ms. Dooley`s Science Class

... G0 – cell stops dividing (Ex: nerve cell) ...
Cellular Injury-Adaptations-Necrosis-Apoptosis
Cellular Injury-Adaptations-Necrosis-Apoptosis

... WHAT ARE TELOMERES? ...
miracle_of_life_guided_notes [2/10/2017]
miracle_of_life_guided_notes [2/10/2017]

... f. Genetic code for a male baby is XY and female baby is XX 3. Genes a. Found on chromosomes b. Pass genetic traits to offspring 4. Inherited Traits a. Dominant – expressed if one parent has the trait b. Recessive – expressed only if both parents have the trait ...
Mendel and meiosis notesheet File
Mendel and meiosis notesheet File

... Heredity - ________________ on of _______________________ from _______________ to ___________________ Genetics - ___________________________________________________ Gregor Mendel • Born in _________ • Studied _____________ and ____________________ in ____________ • Became a ____________ – taught ___ ...
human-heredity-9th-edition-michael-cummings-solution
human-heredity-9th-edition-michael-cummings-solution

... Meiotic anaphase II more closely resembles mitotic anaphase by the two criteria cited above. 28. During gamete formation, the 23 pairs of human chromosomes independently assort, creating gametes that are genetically different. For example, one gamete may have 10 paternally derived chromosomes and 13 ...
File - Down the Rabbit Hole
File - Down the Rabbit Hole

... Monosomy and Trisomy due to Nondisjunction  members of homologous chromosomes do not move apart in Meiosis I or sister chromatids do not separate during Meiosis II leaves one cell with too few chromosomes and one cell with too many. ...
22 b working final Mitosis and Meiosis made Simplewith stage
22 b working final Mitosis and Meiosis made Simplewith stage

... bottom biological dictionary – look up Meiosis – go to next page at bottom and then go to meiosis animation. 10. Four new ________________ cells have formed from the original cell. Each of the four cells has half the number of chromosomes that the original cell had, and therefore only half the amoun ...
DNA Test Study Guide
DNA Test Study Guide

... d. bases. XXXX Notes: Genes are not made from ATP molecules (this is photosynthesis and cell respiration) No A Genes are not made from sugars (so no C) Genes that have an abnormal production means that they have an abnormal protein which means a mutation occurred in their DNA so B is incorrect and D ...
Lecture Exam IV - Napa Valley College
Lecture Exam IV - Napa Valley College

... I have a plant that is producing purple flowers. This variety of plant can produce either purple or white flowers and the purple flowers are dominant over white flowers. These plants can’t self fertilize. Since the flowers are purple I don’t know the genotype of this plant, it could be homozygous do ...
1 DTU Systems Biology Mette Voldby Larsen, CBS, Building 208
1 DTU Systems Biology Mette Voldby Larsen, CBS, Building 208

... separated during the generation of the gametes. The progeny inherits one allele from the father and one allele from the mother. Punnett square: Learn how to fill it in and how to use it for deducing geno- and phenotypes in monohybrid and dihybrid crosses. Probability calculations can be used for the ...
Structure and History of DNA 1-8
Structure and History of DNA 1-8

... Forms a right-handed helix. The strands run antiparallel. There are about 10 base pairs per turn of the helix. One turn of the helix is 3.4 nm. The base pairs are .34 nm apart. Sugar phosphates on outside, base pairs on inside. ...
1 - WordPress.com
1 - WordPress.com

... D. Write down the correct sequence of letters to show the phases of mitosis from beginning to end. ...
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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.
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