NAME:…………………………………… DATE: ……………………. ACTIVITY: Making homologous chromosomes, with homozygous and heterozygous allele pairs. You are provided with: - coloured popsicle sticks - glue stick - black pen/marker/sharpie The Activity: 1. Read the instructions carefully and clear your doubts before you start the activity. 2. Take two coloured popsicle sticks and glue them in the square given on the next page. These are your chromosome pairs. 3. Using black pen/marker/sharpie, mark a few lines and label them with letters in such a way that you get three allele pairs. These allele pairs should be homozygous dominant, homozygous recessive and heterozygous. 4. The points to note will be: - the lengths of the selected popsicles (to get the homologous chromosomes) - English letters (they should depict a particular trait) - letter case (to showcase dominant and recessive alleles in each allele pair) 4. After making your homologous chromosome pair, answer the following questions. Answer the questions: 1. Have you selected the popsicle sticks of same or different length? Give reasons for your choice. _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ 2. What are the letters used for homozygous dominant allele pair? Which trait is depicted by these letters? _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ 3. What are the letters used for homozygous recessive allele pair? Which trait is depicted by these letters? _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ 4. What are the letters used for heterozygous allele pair? Which trait is depicted by these letters? _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ MY HOMOLOGOUS CHROMOSOME PAIR
