CH 10 - CH.10. Objectives 1.,segregation, 2. 3.

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CH. 10. Observing patterns in inherited traits    Objectives :   1.     Know Mendel’s principles of dominance, segregation, and independent assortment.   2.     Understand how to solve genetics problems that involve monohybrid and dihybrid crosses.   3.     Understand the variations that can occur in observable patterns of inheritance.     Key Terms: genes locus diploid mutation alleles true-breeding lineage hybrids homozygous heterozygous dominant allele recessive allele homozygous dominant homozygous recessive heterozygous genotype phenotype P, F1, F2 monohybrid cross probability Punnett-square method testcross Mendel's theory of segregation dihybrid cross Mendel's theory of independent assortment codominance ABO blood typing multiple allele system incomplete dominance pleiotropy Marfan syndrome melanin albinism
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campodactyly continuous variation environmental effects Lecture Outline :                   Impacts, Issues: In Pursuit of a Better Rose  A.    Artificial selection has been used to breed plants for thousands of years. 1.     Ancestral rose stock had two sets of seven chromosomes. 2.     Today through artificial breeding, roses have two to eight sets of chromosomes, to enhance  hardiness, fragrance, petal count, and other features. 3.     These cultivated varieties are more susceptible to disease. B.    New research programs mapping the rose chromosomes are being used to genetically  engineer a better rose.          10.1.    Mendel, Pea Plants, and Inheritance Patterns            A.   Introduction                    1.    By the late nineteenth century, natural selection suggested that a population could  evolve if members show variation in heritable traits. Variations that improved survival  chances would be more common in each generation—in time, the population would  change or evolve.                   2.   The theory of natural selection did not fit with the prevailing view of inheritance— blending.                           a.   Blending would produce uniform populations; such populations could not evolve.                           b.   Many observations did not fit blending—for example, a white horse and a black  horse did not produce only gray ones.                   3.   Gregor Mendel used experiments in plant breeding and a knowledge of mathematics to  form his hypotheses.
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CH 10 - CH.10. Objectives 1.,segregation, 2. 3.

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