Punnett Squares
Biology ⇒ Genetics and Heredity
Punnett Squares starts at 8 and continues till grade 12.
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See sample questions for grade 8
If a cross between two parents results in 100% dominant phenotype, what can you infer about the parents' genotypes?
If a parent has genotype Aa and another has genotype aa, what are the possible genotypes of their offspring?
If a parent is homozygous recessive (aa), what type of gametes can it produce?
If a Punnett square shows 50% Tt and 50% tt, what were the genotypes of the parents?
If a cross between two parents results in 100% dominant phenotype, what can you infer about the parents' genotypes?
If a parent has genotype Aa and another has genotype aa, what are the possible genotypes of their offspring?
If a parent is homozygous recessive (aa), what type of gametes can it produce?
If a Punnett square shows 50% Tt and 50% tt, what were the genotypes of the parents?
Which of the following best describes a homozygous genotype? (1) Two identical alleles (2) Two different alleles (3) One dominant and one recessive allele (4) No alleles
Which of the following best describes a Punnett square? (1) A tool for measuring DNA (2) A chart for predicting genetic crosses (3) A type of cell (4) A method for cloning organisms
Which of the following best explains why Punnett squares are important in genetics? (1) They help predict possible offspring traits (2) They show the structure of DNA (3) They determine the number of chromosomes (4) They are used to clone organisms
Which of the following is a heterozygous genotype? (1) TT (2) Tt (3) tt (4) TT and tt
Fill in the blank: A cross between two organisms that differ in one trait is called a _______ cross.
Fill in the blank: In a dihybrid cross, a Punnett square has _______ boxes.
Fill in the blank: In a monohybrid cross, the Punnett square has _______ boxes.
Fill in the blank: In a Punnett square, the letters on the top and side represent the _______ of the parents.
True or False: A heterozygous organism has two different alleles for a trait.
True or False: A Punnett square can be used for both plants and animals.
True or False: A Punnett square can be used to predict the probability of offspring inheriting certain traits.
True or False: A Punnett square can only be used for monohybrid crosses.
