If both parents have the genotypes Aa and if they produce a family of four children,...

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If both parents have the genotypes Aa and if they produce a family of four children, the binomial expansion shows the probabilities of obtaining families of different phenotypic combinations as follows: 81/256 all A-; 108/256 3A-: laa; 54/256 2A-: 2aa; 12/256 1A-: 3aa; and 1/256 all aa. A sample was obtained of a large number of families consisting of four children in which both parents were known to be Aa. Do these data approximate the expected distribution? Complete the following table, calculate X², and answer the related questions. Family Ratios All A- 3A-: 1aa 2A-: 2aa 1A-: 3aa All aa Totals a. C. 0 1440 1986 970 197 15 E e. 0-E degrees of In interpreting this X² value, you have. freedom. b. In this case, do you accept/reject the hypothesis that these data approximate the ratio suggested above?. What is the probability that the deviations are due to chance alone? (0-E)² (0-E)¹/E d. In a heterozygote mating between Aa x Aa, the theoretically expected ratio among the offspring is 3A-: laa. How many families represented in the table have four children in the expected 3:1 ratio? CC X²= What is the theoretically expected percentage of the families that should have four children in a perfect 3:1 ratio? f. How do you account for this low frequency of the expected results? 1111 If both parents have the genotypes Aa and if they produce a family of four children, the binomial expansion shows the probabilities of obtaining families of different phenotypic combinations as follows: 81/256 all A-; 108/256 3A-: laa; 54/256 2A-: 2aa; 12/256 1A-: 3aa; and 1/256 all aa. A sample was obtained of a large number of families consisting of four children in which both parents were known to be Aa. Do these data approximate the expected distribution? Complete the following table, calculate X², and answer the related questions. Family Ratios All A- 3A-: 1aa 2A-: 2aa 1A-: 3aa All aa Totals a. C. 0 1440 1986 970 197 15 E e. 0-E degrees of In interpreting this X² value, you have. freedom. b. In this case, do you accept/reject the hypothesis that these data approximate the ratio suggested above?. What is the probability that the deviations are due to chance alone? (0-E)² (0-E)¹/E d. In a heterozygote mating between Aa x Aa, the theoretically expected ratio among the offspring is 3A-: laa. How many families represented in the table have four children in the expected 3:1 ratio? CC X²= What is the theoretically expected percentage of the families that should have four children in a perfect 3:1 ratio? f. How do you account for this low frequency of the expected results? 1111