Dihybrid Crosses (Grade 12 NSC Matric Life Sciences): Quizzes
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Practise the questions
10 questions from this quiz
What does a dihybrid cross examine?
What does a dihybrid cross examine?
Inheritance of two characteristics
What does the Law of Independent Assortment state?
What does the Law of Independent Assortment state?
Alleles for different genes separate independently
How many different gamete types can a TtPp parent produce?
How many different gamete types can a TtPp parent produce?
Four
What must each gamete contain in a dihybrid cross?
What must each gamete contain in a dihybrid cross?
One allele from each characteristic
What is the phenotypic ratio for a TtPp × TtPp cross?
What is the phenotypic ratio for a TtPp × TtPp cross?
9:3:3:1
What size Punnett square is needed for a dihybrid cross?
What size Punnett square is needed for a dihybrid cross?
4×4
What is the phenotype of a plant with genotype TtPp?
What is the phenotype of a plant with genotype TtPp?
Tall, purple
When is a recessive trait expressed in the phenotype?
When is a recessive trait expressed in the phenotype?
When both alleles are lowercase
How many total offspring appear in a 4×4 Punnett square?
How many total offspring appear in a 4×4 Punnett square?
16
Which is a valid gamete from a TtPp parent?
Which is a valid gamete from a TtPp parent?
Tp