Punnett Square


Description

answer the following:

In tomatoes, red fruit color is dominant to yellow. Suppose a tomato plant homozygous for red is crossed with one homozygous for yellow. Assume there is no incomplete dominance. Determine the number of phenotypes and genotypes of

the F1 offspring

  1. the offspring of a cross of the F1 back to the red parent

the offspring of the F1 back to the yellow parent

Use a Punnett square to predict the offspring in a cross between a dwarf pea plant (homozygous recessive) and a tall pea plant (heterozygous). What is the phenotypic ratio of the offspring?

Use a Punnett square to predict the offspring in a cross between a tall pea plant (heterozygous) and a tall pea plant (heterozygous). What is the genotypic ratio of the offspring?

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