Your baby's nose shape is determined by a gene on chromosome #14. The allele "U" imparts a rounded shape to the nose. Place your baby's genotype for nose shape in the data table Chromosome #22 carries the gene for free ears. The gene "Z" causes the earlobe to hang free at the side of the head. Place your baby's genotype for earlobe attachment in the data table. Chromosome #20 contains DNA information encoded in a gene called "D". This information, if in its dominant form, causes the ear to grow a large amount of fuzzy hair. Place your baby's genotype for hairy ears in the data table. Back to Front Page Back to Teacher's Information Page Back to Student's Instructions and Materials Back to Genotype -> Phenotype Classroom Booklet