Using the Punnet Square above, make a cross between a PURE YELLOW SEED parent and a PURE GREEN SEED parent. POSSIBLE OFFSPRING GENOTYPE PHENOTYPE What is the probability an offspring will show the DOMINANT TRAIT (YELLOW SEEDS)? What is the probability an offspring will show the RECESSIVE TRAIT (GREEN SEEDS)? MAKING MONOHYBRID CROSSES: What is the genotype of a PURE PURPLE FLOWERED plant ? = What is the genotype of a PURE WHITE FLOWERED plant? = What is the genotype of a HYBRID PURPLE FLOWERED plant? =
When a pure yellow seed plant parent plant is crossed with a pure green seed parent plant, then the offspring in the F2 generation will be 3 yellow seed plant and 1 green seed plant. The phenotype of F2 generation will be - 3:1 while the genotypic ratio will be 1:2:1. The probability of of offspring that will show the dominant trait will be 3/4 and those which show the recessive trait will be 1/4.
When we perform a monohybrid cross between purple flowered plant and white flowered plant, then out of 4 offspring in the F2 generation, 3 will be purple flowered and 1 will be white flowered. The genotype of F2 generation will be 1:2:1 which is pure purple flowered plant : hybrid purple flowered plant : white flowered plant.
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