4. Summer squash color depends on the interaction between two genes. One gene (B) inhibits the production of color at another gene (A). If the production of color is not inhibited, then big “A” will produce yellow pigment, while little “a” produces green. Two white squash plants that are heterozygous for both genes are crossed. a. What type of inheritance is this? b. Complete the cross above. Identify what genotypes are white, yellow, and green. Include the expected phenotypic ratio (white:yellow:green).

Part 1: Make a three part process drawing (like a cartoon strip) to demonstrate Mendel's Principle of Segregation. Use two parents with homologous chromosomes marked with alleles "A" and "a". Circle and label these three action parts of the Principle of Segregation: a) parents are diploid, b) alleles separate to form haploid gametes (indicate when this happens), and c) gametes from each parent combine at random to form diploid offspring Part 2: Use the cross Aa x Aa and a Punnett square to demonstrate Mendel's Principle of Segregation. Circle and label these three action parts of the Principle of Segregation: a) parents are diploid, b) alleles separate to form haploid gametes and c) gametes from each parent combine at random to form diploid offspring. Part 3: Use homologous chromosomes marked with alleles "A" and "a" and a second pair of homologs marked with alleles "B" and "b". to demonstrate Mendel's Principle of Independent Assortment in cells in Meiosis. Indicate what phase this…

1. The height of a wheat plant is determined by several genes. In a variety the minimum size is 12 inches and the maximum is 24 inches. 12-inch plants were crossed with 18-inch plants, and produced an 18-inch F1. The F1 was allowed to cross each other, and an F2 was obtained in which the 12 and 24 inch plants were obtained with a frequency of 2/8195. How many genes are involved in determining plant size in this variety of wheat? Select one: a. 5b. 6c. 4d. 3

9. A true-breeding blue-flower, wrinkled-seed, short-stem, yellow-leaf plant was crossed with a true-breeding red-flower, round- seed, long-stem, green-leaf plant and all of the progeny had the following phenotype: purple-flower, round seed, short-stem, approximately half of the leaves on the plants were yellow and the other half green. Assuming a single gene controls each trait, describe the inheritance pattern for each gene. Inheritance Pattern a. Gene Flower color Seed shape Stem length Leaf color