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Mitosis vs. Meiosis PPT
Mitosis vs. Meiosis PPT

... and the rest of the cell ...
File - S
File - S

EOC Vocab Review Terms
EOC Vocab Review Terms

... 20. ___ Important energy molecule in all cells d . ATP _______________________________________________________________________________ 21. ___Diffusion of water 22. ___Movement of anything from high to low 23. ___Phospholipid bilayer ...
The Origins of Variation
The Origins of Variation

... material from one population to another by sexual reproduction e.g., movement of mitochondrial genome of one species into another e.g., acquisition of genetically engineered genes (e.g., pest or ...
Bill Nye Genes Video WKSHT
Bill Nye Genes Video WKSHT

Bill Nye Genes Video WKSHT
Bill Nye Genes Video WKSHT

... 12. Mom tells Richie: Genes are the set of chemical instructions that get passed down from Parent to child. In the process, of course, the genetic material is recombined in new ways, which is why some people bear resemblance to their Parents and Grandparents without looking like any one relative in ...
Chromosome Rearrangements Concepts: Chromosome
Chromosome Rearrangements Concepts: Chromosome

... These deletion products, if incorporate into a zygote, are usually lethal. Only two of the four gametes would produce viable gametes, both of which are parental in organization: one normal + one inversion. Consequence is that: 1) "recombinants" (vs. parentals) will be reduced in frequency recombinan ...
Bill Nye: Genes
Bill Nye: Genes

... 12. Mom tells Richie: Genes are the set of chemical instructions that get passed down from Parent to child. In the process, of course, the genetic material is recombined in new ways, which is why some people bear resemblance to their Parents and Grandparents without looking like any one relative in ...
Name Date “Bill Nye: Genes” Video Worksheet 1. Where do your
Name Date “Bill Nye: Genes” Video Worksheet 1. Where do your

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Prokaryotic Cells: What Structures Are Present in All Cells? 1

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ESSENTIAL CONCEPTS CLASS ACTIVITY 1: Polygenic Inheritance

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Meiosis/Mitosis Webquest
Meiosis/Mitosis Webquest

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Can You Find it in Your Binder?

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File - Pedersen Science

Chapter 12-1: DNA
Chapter 12-1: DNA

... Because males are _______ they have only _______ copy of the genes on the X chromosome. In males, only _______ recessive allele on the X chromosome is necessary for the recessive phenotype to be expressed because there is _______ another allele for this gene on the Y chromosome. Some sexlinked (also ...
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File

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Ch 10: Genetic Change and Variation
Ch 10: Genetic Change and Variation

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11-2 Genetics and Probability

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500 100 How Organisms Grow The Stages of Life Inherited
500 100 How Organisms Grow The Stages of Life Inherited

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Producing offspring by the joining of sex cells.
Producing offspring by the joining of sex cells.

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Inheritance and Adaptations
Inheritance and Adaptations

... response to its environment, the organism’s genes are not affected and the change cannot be passed down.  The only way a trait can be passed down is if the organism’s genes change.  A mutation is a permanent change in the sequence of DNA in a gene.  All genes can mutate, only mutated genes in egg ...
Chromosomes
Chromosomes

... • Chromosomes are the structures that contain the genetic material – They are complexes of DNA and proteins • The genome comprises all the genetic material that an organism possesses – In bacteria, it is typically a single circular chromosome – In eukaryotes, it refers to one complete set of nuclea ...
sex linkage and disorders
sex linkage and disorders

... in females only when it is inherited from both parents. By contrast, males inherit their single Xchromosome from their mothers and become red green color blind if this X-chromosome has the color perception defect. ...
Name: Date: Period: ______ Biology Notes: Mitosis Directions: Fill in
Name: Date: Period: ______ Biology Notes: Mitosis Directions: Fill in

... 2) During which interphase stage do organelles replicate? __________________________________________ 3) What do you call the division of the cell’s cytoplasm? ___________________________________________ 4) Which type of cells divide by mitosis? _______________________________________________________ ...
Unit 5 Cell Reproduction
Unit 5 Cell Reproduction

... (a) a gene mutation occurred that resulted in brown hair and brown eyes (b) gene expression must change in each generation so evolution can occur (c) the child received genetic information from each parent (d) cells from his mother’s eyes were present in the fertilized egg 3) Viruses frequently infe ...
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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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