IN SNAPDRAGONS, THERE ARE FLOWERS THAT PRODUCE RED PIGMENT AND FLOWERS THAT PRODUCE NO PIGMENT (WHITE). WHEN A TRUE BREEDING RED FLOWER IS CROSSED WITH A TRUE BREEDING WHITE FLOWER, THE RESULT IS 100% PINK OFFSPRING. WHAT IS THE MODE OF INHERITANCE? WHAT IS THE EXPECTED PHENOTYPIC RATIO (USE COLONS!) OF A CROSS OF TWO PINK FLOWERED PLANTS? C

A type of tomato (Solanum lycopersicum) produces fruit in three possible colors: red, green, and orange. You cross a true-breeding orange-fruited plant with a true-breeding green-fruited plant, and all the F1 offspring are red. You intercross the red F1s, and the resulting F2 generation consists of 108 red-, 40 orange-, and 44 green-fruited plants.   1) What type of epistasis is acting (dominant, recessive, duplicate dominant, or duplicate recessive)?    2) Assign the phenotypes to a modified 9:3:3:1 ratio. (Do not just calculate the actual ratio of the phenotypes.)  Red : _____Orange : _____Green: _____

Many of the color varieties of summer squash are determined by two different interacting genes A and B: AA or Aa gives white colored squash, aaBB or aaBb gives yellow squash, and aabb produces green squash.  A plant producing white squash is self-crossed. Three fourths of the offspring produces white squash; one fourth produces green squash. What is the genotype of the parent plant producing white squash?

In venetian violets, three phenotypes occur with respect to flower color: a deep violet (almost back), a white, and a pale lavender. Two pale lavender flowered plants have been crossed. The F1 from this cross has individuals with deep violet flowers, with pale lavender flowers, and individuals with white flowers. A. what are the parent genotypes? B. what would the expected phenotypic ratio be in these F1 plants?

Show the cross between a heterozygous purple flowered pea plant and a white flowered pea plant. What is the genotypic ratio of the above cross? What is the phenotypic ratio of the above cross?

A rabbit with black fur (B) is crossed with a rabbit with white fur (b). All of the offspring have black fur. What is the genotype of the black rabbit parent?