Bioethics Ethics of biological research Ethics morals right
Bioethics • Ethics of biological research • Ethics – morals; right or wrong • Should we or shouldn’t we? • Under what circumstances?
Bioethics: Role of the Scientist • • • Research Figure it Out Explain the Unknown Can it be done? How can it be done?
Bioethics: Role of Government, Religion, and Community • • • Use of Information Advantages/Disadvantages Benefits for Better Lives Should it be done? In what circumstances?
What kinds of cells undergo meiosis? Egg cells Sperm cells Germ cells
Meiosis I
Meiosis II
Diploid containing two complete sets of chromosomes, one from each parent Haploid having a single set of unpaired chromosomes
How many chromosomes do each of our cells have?
Chromosome nucleic acids and protein; in the nucleus of cells; carries genetic information Gene physical and functional unit of heredity; sections on chromosomes; instructions to the cell Homologous same relation, relative position, or structure; features and pattern of genes
Gamete sex cells Fertilization joining of 2 gamete cells to produce an offspring different than both parents
Genetic Variation
When does “crossing over” occur?
learn. genetics. utah. edu
Sexual Reproduction • provides variation • allows organisms more flexibility to adapt to environmental change • more complicated process • slower and riskier
Asexual Reproduction • allows for faster reproduction • creates more offspring • does not allow for variation • less flexible when the environment changes
Yeast Budding and Schmooing!
Mutation • a permanent change in the genetic code (DNA) • occur during cellular accidents • like replication, recombination or transposition • may also occur from exposure to foreign mutagens
What is a mutagen? a physical or chemical agent that changes the genetic material of an organism; increases the frequency of mutations above the natural level
A s e x u a l Propagation R e p r o d u c t i o n
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