Your cross is shown below. Look carefully at the phenotypes in the picture, especially between different generations. All the P corn varities are homozygous for all the genotypes you will be studying. The questions are:

1) Is this as a monohybrid cross or a dihybrid cross?

2) (Using the key in the background, use two words to describe: Purple and smooth/ Purple and wrinkled/Yellow and smooth/Yellow and wrinkled)Phenotype of homozygous dominant parent

3) (Using the key in the background, use two words to describe: Purple and smooth/ Purple and wrinkled/Yellow and smooth/Yellow and wrinkled) Phenotype of homozygous recessive parent

4) Which phenotype is dominant? (Purple smooth or Yellow wrinkled)

5) Explain how you know.

6) What is the genotype of the F1.

7) Using your data and your knowledge of Mendelian genetics, calculate the expected counts for the F2 progeny and enter the phenotypes and expected counts.

8) Calculate χ2 for your data using the expected counts that you obtained while answering the previous question.

9) How many df are associated with this test?

10) What is the P-value associated with your χ2 statistic?

11) Does the cross you analysed produce the outcome expected under Mendelian genetics (ie. do you keep the null hypothesis)?

 

17-6900 Dihybrid Cross Colored Alumise BAR R/R Su/Su R/r Su/su PX FX perm, sahu rr su/su R/r Su/su JELIT BR/-Su/_:3R/_su/su: 3r/r Su_.: 1r/r su/su