2nd qtr comp review questions

2nd qtr comp review questions - AP Biology Comp Review 2nd...

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AP Biology Comp Review Name:  ______________________  Period:  _______ 2 nd  Quarter “Problems” 1.  A man and a woman produced 4 children. The first child is a girl, the next three are boys. The odd  numbered children have a rare genetic phenotype of ears-pointing-backwards (very advantageous in cold  climates with a lot of wind). Child number one marries a man who also has this phenotype and they have  two normal boys. a) Draw this family pedigree below. b) Is the disease dominant or recessive?  c) What are the most likely phenotypes of the original man and woman? d) What were the chance that the F1 couple would produce two normal boys?  Show your work. 2.  Describe the mutation that causes Turner’s syndrome.   How could we detect whether a person  has/will have this disease?   3.  A genetic cross involving 4 alleles results in a ratio of 9:7.  What explains these results?     4.  Sickle cell anemia is a disease where a defect in one gene affects many aspects of a person’s  phenotype.  What type of trait is this? _________  Though lethal, why will this disease never be  eliminated from the population? 5.  Attached ears is an autosomal recessive trait in humans. Assume that there are 900 people with attached ears in a population of 10000. How many individuals would be expected to homozygous dominant?
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   6.  There are 100 students in my class. Ninety-six did well in the course whereas four blew it and received 
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This note was uploaded on 03/28/2011 for the course BILD 1 taught by Professor Chen during the Winter '11 term at UC Riverside.

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2nd qtr comp review questions - AP Biology Comp Review 2nd...

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