'Random fertilization' presentation slideshows

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29. Heredity. Genetics. The study of the mechanism of heredity Basic principles proposed by Mendel in the mid-1800s. Genetics. Diploid number of chromosomes In all cells except gametes Diploid number = 46 (23 pairs of homologous chromosomes)

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KEY CONCEPT Gametes have half the number of chromosomes that body cells have.

KEY CONCEPT Gametes have half the number of chromosomes that body cells have. sex cells (egg). body cells. sex cells (sperm). You have body cells and gametes. . Body cells are also called somatic cells. Germ cells develop into gametes. Germ cells are located in the ovaries and testes.

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CHAPTER 13 MEIOSIS AND SEXUAL LIFE CYCLES

CHAPTER 13 MEIOSIS AND SEXUAL LIFE CYCLES. Heredity- the transmission of traits from one generation to the next, also called inheritance . Variation- the differences that offspring have from their parents and siblings. Genetics- t he study of heredity and variation. Introduction.

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Meiosis

Meiosis. Chapter 13: Meiosis and Sexual Life Cycles. Variation. Living organisms are distinguished by their ability to reproduce their own kind Genetics is the scientific study of heredity and variation Heredity is the transmission of traits from one generation to the next

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Mendel and Meiosis

Mendel and Meiosis. 6.3-6.6. DNA, Genes, Traits. DNA Deoxyribonucleic Acid The major nucleic acid in organisms Carries genetic information and is responsible for the transmission of traits. Gene A segment of DNA that codes for a specific trait in an organism Trait

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Genetics Congenital & Genetic Disorders

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Cell Division Notes part 3:

Cell Division Notes part 3:. Meiosis. Meiosis. Meiosis is a type of cell division that is used to produce genetically unique gametes , or sex cells Male gametes are sperm cells; female gametes are eggs

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Meiosis and Sexual Life Cycles

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Introduction

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5.4 Evolution

5.4 Evolution. Define Evolution. Evolution is the process of cumulative change in the heritable characteristics of a population. Charles Darwin at age 22 traveled on HMS Beagle in 1831. Evidence for Evolution. Fossil Record

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Meiosis

Meiosis. -Chapter 13. Cell Division. Chromosome number constant within a species. Humans - 46 chromosomes Apes - 48 chromosomes Cat - 38 chromosomes. Chromosomes are present in sets. Sex chromosomes and autosomes. Sex chromosomes :.

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Unit #4 - Trashketball

Unit #4 - Trashketball. 1. Which of the following is a characteristic of platyhelminthes ? A. Many pairs of legs B. Flat body C. Hard exoskeleton D. Presence of cnidocytes. 2. To which group do sponges belong? A. Cnidaria B. Filicinophyta C. Porifera D. Mollusca.

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BIOL 106

BIOL 106. Human Genetics and Health. Family members look alike but not identical-why? (insert your family photo here). Here is the reason. Sexual Reproduction Ensures Continuity With Variation. Meiosis -a special type of cell division that produces reproductive cells called gametes

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Review:

Review:. *Unit factors in pairs - genetic characteristics are controlled by unit factors that exist in pairs in individual organisms *Principle of Dominance and Recessiveness - one factor is dominant over the recessive one

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