Question 9 From Case Study 2_Corn, which of the following statements best expres

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Question 9 From Case Study 2_Corn, which of the following statements best expresses the null hypothesis for this experiment? [2 pt; L2; I.A.1] Case Study (questions #9 #15): In corn, kernel color and appearance are genetically determined by two loci each with two alleles. Kernels of genotype P are purple, while those of genotype p p are yellow. Kernels of genotype S- are smooth, while those of genotype s s are wrinkled. In a test cross, a plant heterozygous at both loci was crossed with a plant that was homozygous recessive at both loci. The actual numbers of offspring obtained in the cross are given below. Using Microsoft Excel, perform an appropriate statistical test to evaluate the data and answer questions #9 15 Observed Number of Progeny Expected Number of Progeny Genotype Pp / Ss Pp/ss pp/Ss 28 20 30 The two genes are not linked and, therefore, do not assort independently The two genes are linked and, therefore, do not assort independently The two genes are not linked and, therefore, assort independently The two genes are linked and, therefore, assort independently 2 points Saved Question 10

Explanation / Answer

Answer. The two gene are not linked and, therefore, assort independently.

Explanation.

Test cross ratio of dihybrid cross= 1:1:1:1 ( if the genes are not linked).

Total progeny= 22+28+20+30= 100

Each genotype will be 100/4= 25

The observed progeny is approximately similar. So the both genes assort independently and are not linked.

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