In corn, a colored grain (aleurone) is due to the presence of an R allele; rr is colorless. Another gene controls the color of the plant, with gg being yellow and G_ being green. A plant of unknown genotype is test-crossed, and the following progeny plants are obtained. colored green 41 colored yellow 11 colorless green 9 colorless yellow 39 What is the approximate map distance between the R locus and G locus

Sally, age 3 months, has a moist, red, vesicular rash on her cheeks, the backs of her hands, and her arms. her mother said sally was constantly trying to scratch the rash and often has difficulty sleeping. her father has a family history of allergic rhinitis and asthma. discussion questions. 1. review atrophic dermatitis from chapter 3 and discuss the pathophysiology of sally’s symptoms. 2. why is the father’s medical history significant, and what can sally expect as she grows up? 3. discuss the need to limit scratching, and describe practical methods to achieve this.