Practice_Midterm_2_with_Key

Practice_Midterm_2_with_Key - Name_Student ID#_ Bio 50 Exam...

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Name_____________________________Student ID#____________________________ Bio 50 Exam II 80 total points 1 Signature for Honor Pledge________________________________ 1. (15 points; 1 each) Next to each term or phrase in the left hand column, write the number from the right hand column that best corresponds. 18 allopolyploid 16 genetic mosaic 12 aneuploid 9 positive interference 10 mitotic recombination 15 triploids and tetraploids 11 ordered tetrad analysis 4 cyclin dependent kinase 3 unequal crossing over 2 nonparental ditype 17 haplo-insufficient 1 linkage 5 centimorgan 7 double crossovers 8 cross over in a para- centric inversion loop 1) recombination frequency less than 50% 2) 4 strand double crossover 3) causes a duplication 4) required for cell cycle progression 5) 1% recombination frequency 6) tetratype ascus 7) causes inaccuracies in recombination mapping 8) acentric and dicentric chromosomes result 9) # of observed double crossovers less than expected 10) causes twin spots 11) gene to centromere mapping 12) Down syndrome individual 13) second division segregation 14) # of PD = # of NPD 15) euploidy 16) displays a variegated phenotype 17) +/deletion inviable 18) mixture of chromosomes from closely related species
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Name_____________________________Student ID#____________________________ Bio 50 Exam II 80 total points 2 2. (15 points) Drosophila female flies that are heterozygous for recessive alleles at three loci on chromosome 3 (“p” for pink eyes, “cp” for clipped wing margins, and “nb” for no bristles) are crossed to true breeding pink eyed, clipped wing, no bristle males. The distribution of phenotypes in the progeny was: p + + 422 + cp nb 429 p + nb 52 + cp + 47 p cp + 23 + + nb 26 p cp nb 1 ______ 1000 a. (5 points) Draw the cis trans relationship of alleles
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Practice_Midterm_2_with_Key - Name_Student ID#_ Bio 50 Exam...

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