midterm_1_jan_28.DOC

midterm_1_jan_28.DOC - _ Last name Circle TA name _ First...

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_________________ _________________ _________________ 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. 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? 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. What numbers of each progeny phenotype do you expect in 160 progeny obtained from this cross.
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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 cell. Is this cell undergoing mitosis or meiosis?
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This note was uploaded on 07/08/2009 for the course LIFESCI ls 4 taught by Professor Merriam during the Winter '08 term at UCLA.

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midterm_1_jan_28.DOC - _ Last name Circle TA name _ First...

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