09-2010学年第一学期期末考试卷 a 卷（09-2010 academic years final exam volume a）.docVIP

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09-2010学年第一学期期末考试卷 a 卷（09-2010 academic years final exam volume a）.doc

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09-2010学年第一学期期末考试卷 a 卷（09-2010 academic years final exam volume a） Chuxiong Normal University A examination volume for the first semester of the 2009-2010 academic year Course genetics exam time: 120 minutes Reference answers and scoring criteria Class name, student number Item number 1234567 total score Score The marking A glossary (to match each 2 points, a total of 12 points) 1 and multiple alleles Main points: more than two alleles which affect the same trait are called complex alleles. 2, genetic imprinting Important: the phenomenon that the same genetic structure exhibits phenotypic effects due to different sources (parent or mother) is called phylogenetic imprinting, also known as genomic imprinting. 3, linkage inheritance Main point: in genetics, the phenomenon that linkage of different traits is often associated with offspring is called linkage inheritance. 4, double exchange Main point: the two simultaneous exchange in a chromosome region is called double exchange, and the recombinant gamete formed by double exchange is called double exchange gamete. 5, heritability Main point: heritability, also known as heritability, is a basic indicator of the relative importance of genetic factors and environmental effects. They are generalized heritability, narrow heritability, and heritability. 6, penetrance Main point: in a group of individuals with specific genes, the proportion of individuals who express the trait determined by the gene is called penetrance. Two, Jane answer (14 points) 1. The characteristics of cytoplasm heredity. (7 points) Key points: characteristics of cytoplasmic inheritance: either orthogonal or reverse, F1 and maternal phenotype is always consistent (3 points); continuous backcross for non maternal cytoplasmic genes do not lead to recurrent parent and control characters disappear, but its nuclear genetic material per backcross generation by half speed reduction, until it is total replacement (3 points); non transduction genetic material