midterm 1 jan 28

midterm 1 jan 28 - _Key_ Last name Circle TA name _ First...

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______Key________ _________________ _________________ Last name First name Student number Circle TA name Paula Wade John Andy Stacey 1 st Midterm Exam LS 4 Lecture 2 Jan 28, 2002 1. A plant with purple flowers and spiny leaves was self crossed and gave these results: 94 purple spiny, 28 purple smooth, 32 white spiny, 11 white smooth What is the genotype of the plant? Define symbols for dominant and recessive tratis. P = purple, p = white, S = spiny, s = smooth Pp Ss A cross of purple smooth x white spiny parents results in 100 white spiny, 100 white smooth, 100 purple spiny and 100 purple smooth progeny. What are the parents’ genotypes? Pp ss x pp Ss 2. A cross of purple smooth x white spiny plants from problem 1 gives only purple spiny and purple smooth progeny. You plan to cross one of the purple spiny x one of the purple smooth plants from these progeny. Diagram the Punnett square for this cross. Pp Ss x Pp ss PS Ps pS ps Ps PPSs PPss PpSs Ppss ps PpSs Ppss ppSs ppss What numbers of each progeny phenotype do you expect in 160 progeny obtained from this cross.
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Purple Spiny 3/8 x 160 = 60 Purple smooth 3/8 x 160 = 60 White spiny 1/8 x 160 = 20 White Smooth 1/8 x 160 = 20_ 160 3. By following the amount of DNA in a cell, you can determine the kind and stage of the division process at different times for that cell. Below is the record of one
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This note was uploaded on 08/20/2008 for the course CHEM 14D taught by Professor Hardinger during the Spring '08 term at UCLA.

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midterm 1 jan 28 - _Key_ Last name Circle TA name _ First...

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