Consider a situation where you have a parental cross with the mother and father phenotypes listed below. Remember that the genotype for the wild-type parent is always homozygous. The counts of the F1offspring are listed in Table 1. Two randomly selected individuals are selected and mated to produce a set of F2individuals. If you test the F2counts to determine whether they are consistent with an autosomal recessive mode of inheritance, what is your decision? Use a 0.05 significance level. PARENTAL CROSS
Consider a situation where you have a parental cross with the mother and father phenotypes listed below. Remember that the genotype for the wild-type parent is always homozygous.
The counts of the F1offspring are listed in Table 1. Two randomly selected individuals are selected and mated to produce a set of F2individuals. If you test the F2counts to determine whether they are consistent with an autosomal recessive
PARENTAL CROSS
Parental cross: Mother with wild type phenotype, Father with disease phenotype.
Table 1. F1 DATA
Gender | Phenotype | |
Disease | Wild-type | |
Male | 60 | 0 |
Female | 65 | 0 |
Table 2. F2 DATA
Gender | Phenotype | |
Disease | Wild-type | |
Male | 46 | 23 |
Female | 41 | 15 |
A. Reject the null hypothesis that the F2 data are consistent with an autosomal recessive mode of inheritance; the p-value for the chi-square goodness of fit test < 0.05.
B. Do not reject the null hypothesis that the F2 data are consistent with an autosomal recessive mode of inheritance; chi-square goodness of fit test statistic value is between 1 and 10.
C. Reject the null hypothesis that the F2 data are consistent with an autosomal recessive mode of inheritance; the p-value for the chi-square goodness of fit test > 0.05.
D. Reject the null hypothesis that the F2 data are consistent with an autosomal recessive mode of inheritance; the true mode of inheritance is X-linked recessive.
E. Do not reject the null hypothesis that the F2 data are consistent with an autosomal dominant, homozygous lethal mode of inheritance; chi-square goodness of fit test p-value > 0.10.
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