Exercise
Form 9: Punnett Squares with Heterozygous and Recessive Parents (Tt x tt)
In this engaging exercise, students will explore the principles of inheritance by using Punnett squares to predict the possible genotypes and phenotypes of offspring from a cross between heterozygous (Tt) and recessive (tt) parents, enhancing their understanding of dominant and recessive traits in genetics. Through hands-on practice, learners will deepen their grasp of key genetic concepts while solving real-world genetics problems!
Questions
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MultiChoice
In a cross between a heterozygous tall plant (Tt) and a short plant (tt), what percentage of offspring is expected to be tall?
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MultiChoice
In a Tt x tt cross, what percentage of offspring is expected to be short?
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MultiChoice
What is the expected phenotypic ratio for a Tt x tt cross?
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MultiChoice
What are the expected genotypes of offspring from a Tt x tt cross?
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MultiChoice
How many boxes in a Tt x tt Punnett square will contain the genotype 'tt'?
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MultiChoice
How many boxes in a Tt x tt Punnett square will contain the genotype 'TT'?
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MultiChoice
If a heterozygous black guinea pig (Bb) is mated with a white guinea pig (bb), what fraction of offspring will be white?
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MultiChoice
What type of test cross is used to determine if an individual showing a dominant trait is heterozygous or homozygous dominant?
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MultiChoice
If a test cross produces 50% dominant and 50% recessive offspring, what was the genotype of the unknown dominant parent?
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MultiChoice
In a cross of Rr x rr (where R = round, r = wrinkled), how many out of 8 offspring are predicted to have wrinkled seeds?
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MultiChoice
What is the probability of producing a homozygous dominant (RR) offspring from an Rr x rr cross?
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MultiChoice
If a dog breeder crosses a heterozygous brown dog (Bb) with a blonde dog (bb), what percentage of puppies will be brown?