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Genetics

Exam 1

QuestionAnswer
genetics scientific study of heredity and hereditary variation
hereditary the transmission of traits from one generation to the next is called inheritance or heredity
when did the study of genetics begin? a long held fascination
Hippocrates 500 B.C.E, Theory of Pangenesis (seeds are produced by all parts of the body in fluids called "humors"), collected in repro. organs
Aristotle 384 B.C.E, proposed that blood produced and carried traits. male blood needed to form semen, semen-contained generative vital thermal (organisms start without out without form and are molded into their final form using a generative force)
preformation in the 17th and 18th centuries scientists using the newly developed microscopes imagined that they could see miniature replicas of human beings inside sperm heads.
Jean-Baptiste Lamarck invoked the idea of “the inheritance of acquired characters,” not as an explanation for heredity but as a model for evolution
Alfred Russel Wallace originally postulated the theory of evolution by natural selection
Walter Sutton and Theodore Boveri propose that chromosomes bear hereditary factors in accordance with Mendelian laws
Hershey and Chase experiment using radioactive Sulfer and Phosphorus with bacteriophages
P generation parental generation, the first two individuals that mate in a genetic cross
F1 generation the first generation of offspring obtained from an experimental cross of two organisms
F2 generation the second generation of offspring, obtained from an experimental cross of two organisms; the offspring of the F1 generation
meiosis (genetics) cell division that produces reproductive cells in sexually reproducing organisms
Principle of Dominance when individuals with contrasting traits are crossed, the offspring will express only the dominant trait
Law of Independent Assortment states that genes for different traits can segregate independently during the formation of gametes
unraveled and long DNA (during interphase)
Created by: danat214