Tri hybrid cross worksheet PDF

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Tri hybrid cross worksheet DUE Thursday OCT 25th Perform a tri hybrid cross between two plants that are heterozygous for three traits. We will use some of the traits Mendel studied in pea plants. In the trait for flower color purple (P) is dominant to white. In the trait for plant height Tall (T) is dominant to short (t). In the trait for seed color yellow (Y) is dominant to green (y). Perform the following cross: PpTtYy X PpTtYy Each parent can create 8 possible gametes (eggs or sperm). Write all eight possibilities below. _________________________________________________________________________________________________ _________________________________________________________________________________________________

Eight gametes from each parent means that an 8 X 8 Punnett square is required fill out the Punnett Square on the next page. Write the number of offspring that have each of the following phenotypes. Purple, tall, yellow: ________ Purple, tall, green: ________ Purple, short, yellow:________ Purple, short, green: _________ White, tall, yellow: _________ White, tall, green: _________ White, short, yellow: _________ White, short, green: _________ Now add those up, what is the total number of offspring? ___________ (it should be the number of boxes in the Punnett square).

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