In one type of plant, orange petals (o) are dominant over yellow petals (o) and tall stems (t) are dominant over short stems (t). complete a dihybrid cross for parents with the genotypes: oott x oott and answer the following in complete sentences.

~describe how you would set up a punnett square for this cross.
~list the likelihood of each possible offspring genotype.
~ list the likelihood of each possible offspring phenotype.

Mr. j, age 42, is a construction worker in las vegas. he recently noticed that a mole on his face seemed to be getting larger and darker. at first he did not worry because he was in the sun a lot and assumed the change may have been caused by sunburn. after a month, not only was the mole larger and darker, but it appeared to be “bumpy.” his doctor diagnosed a malignant melanoma skin cancer following biopsy of the nevus. mr. j reports pain in his right shin that does not go away when he puts his feet up or sleeps. discussion questions 1. relate mr. j’s skin changes to the warning signs for malignant melanoma. (see malignant melanoma.) 2. discuss the normal progression of this malignancy. what is the significance of the bone pain that mr. j is experiencing? (see malignant melanoma.) 3. discuss the treatment available for this patient and the prognosis for recovery. (see malignant melanoma.)