Worksheet 1—Basic Understanding of Genetics
Worksheet—Basic Understanding of Genetics.
(Use of program genetics basic.xls will help with understanding. Try different values for fraction of A, and use results to predict fraction A in next generation.)
Suppose in the current generation, 30% of the alleles are A and 70% are B. Suppose 1000 children are born to the next generation.
1) What is the probability of a child receiving an A allele from the mother and an A allele from the father?
2) What is the probability of the child receiving B alleles from both parents?
3) What is the probability of the child receiving an A allele from one parent and a B allele from the other parent?
4) What fraction of the children will be AA? BB? AB or BA? How many of the 1000 children do you expect to be AA? BB? AB or BA?
5) How do the results compare to the simulation using the spreadsheet?
6) The 1000 children have 2000 alleles, 2 for each child. What fraction of the alleles do you expect to be A? How does this compare with the the spreadsheet simulation ?
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