GENETICS - BIOL 7    Quiz 8        December 1, 2005    NAME:

An individual heterozygous at loci A & B was test crossed.  100 offspring were counted, and the following proportions were found.  What were the parents’ genotypes and phenotypes, including any linkage information, map distances, etc.  that you can determine (give complete information).

What would the answer be if 1000 offspring were counted, with the same proportions in each category?

22  AB
30  Ab
23  aB
25   ab

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Table: Chi-Square Probabilities

df     0.995    0.99    0.975    0.95    0.90    0.10    0.05    0.025    0.01    0.005
1     ---    ---    0.001    0.004    0.016    2.706    3.841    5.024    6.635    7.879
2     0.010    0.020    0.051    0.103    0.211    4.605    5.991    7.378    9.210    10.597
3     0.072    0.115    0.216    0.352    0.584    6.251    7.815    9.348    11.345    12.838
4     0.207    0.297    0.484    0.711    1.064    7.779    9.488    11.143    13.277    14.860
5     0.412    0.554    0.831    1.145    1.610    9.236    11.070    12.833    15.086    16.750
6     0.676    0.872    1.237    1.635    2.204    10.645    12.592    14.449    16.812    18.548