'Homologous chromosomes separate' presentation slideshows

Do Now

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Mendelian Genetics and Meiosis

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Genes, Chromosomes and DNA

Genes, Chromosomes and DNA. (Chapter 2). The structure of DNA. Composed of 4 nucleotide bases, 5 carbon sugar and phosphate. Base pair = rungs of a ladder. Edges = sugar-phosphate backbone. Double Helix Anti-Parallel. Figure 2. 21. The structure of DNA. DNA Replication.

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Cross-Dressing or Crossing-Over: Sex Testing of Women Athletes

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Meiosis and Sexual Life Cycle

Meiosis and Sexual Life Cycle. Chapter 13. Heredity (inheritance) - transmission of traits from 1 generation to next. Variation - siblings differ from 1 another. Genetics - study of heredity and variation. http://www.mssm.edu/genetics/fabry/images/figure1b.gif.

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MEIOSIS

MEIOSIS. Meiosis. The form of cell division by which gametes , with half the number of chromosomes, are produced. Diploid (2n) ? haploid (n) Meiosis is sexual reproduction. Two divisions ( meiosis I and meiosis II ). Meiosis.

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Cell Reproduction and Division Ch 8

Cell Reproduction and Division Ch 8. Chromosomes. Chromosome : DNA wrapped up w/ histones (proteins) = organized Chromatin : uncoiled chromosome= unorganized DNA. Chromosome #. All species have their own characteristic # of chromosomes in each cell. Chromosome Number.

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Unit 3 - Genetics

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Systems of Cell Reproduction

Systems of Cell Reproduction. Four events occur before and during cell division: A signal to reproduce must be received. Replication of DNA and vital cell components must occur. DNA must be distributed to the new cells. The cell membrane or cell wall must separate the two new cells.

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Human body cells have 46 chromosomes

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MEIOSIS AND SEXUAL LIFE CYCLES

Section B: The Role of Meiosis in Sexual Life Cycles. MEIOSIS AND SEXUAL LIFE CYCLES. http://www.sumanasinc.com/webcontent/animations/content/meiosis.html. Fertilization and meiosis alternate in sexual life cycles.

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Meiosis & Sexual Reproduction

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Meiosis and Sexual Reproduction

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Linkage and Crossing Over

Linkage and Crossing Over. Linkage. Mr G Davidson. Linkage. Because a chromosome can have hundreds of genes, genes found in the same chromosome are said to be linked. During a cross, therefore, the linked genes will be transmitted together. e.g. peas T=Tall t=dwarf R=Red r=white

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Meiosis & Sexual Reproduction

Meiosis & Sexual Reproduction. Sexual Reproduction. Involves: Meiosis Gamete production Fertilization Produces genetic variation among offspring. Sexual Reproduction Shuffles Alleles. offspring inherit new combinations of alleles, leading to variations in traits

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Mendel & Meiosis

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Mendel & Meiosis

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Monday, 3/18/2013

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Figure 8.12A

Figure 8.12A. Haploid gametes ( n ? 23). Sexual reproduction produces genetically different offspring. n. Egg cell. n. Sperm cell. Meiosis. Fertilization. Ovary. Testis. Diploid zygote (2 n ? 46). 2 n. Key. Mitosis. Haploid stage ( n ). Multicellular diploid adults (2 n ? 46).

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Meiosis

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