What is a Punnett square?
Dominant & Recessive

Quiz
•
Science
•
6th - 8th Grade
•
Hard
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15 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
A diagram used to predict the genetic outcomes of a cross between two organisms.
A tool for measuring the height of plants.
A method for calculating the age of fossils.
A chart for organizing different species of animals.
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is a dominant phenotype?
A trait that is only expressed when two recessive alleles are present.
The observable trait that is expressed when at least one dominant allele is present in the genotype.
A trait that is always expressed regardless of the alleles present.
A phenotype that cannot be observed in the organism.
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is a recessive phenotype?
A trait that is always expressed in the phenotype regardless of the genotype.
A trait that is expressed only when two recessive alleles are present in the genotype.
A trait that can be expressed with just one dominant allele in the genotype.
A trait that is never expressed in the phenotype.
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is an allele?
A type of chromosome that determines physical traits.
A variant form of a gene that can produce different traits.
A process of cell division that leads to genetic variation.
A structure that carries genetic information in the form of DNA.
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is the principle of dominance?
The principle of dominance states that in a heterozygous genotype, the dominant allele will mask the effect of the recessive allele.
The principle of dominance states that recessive alleles are always expressed in the phenotype.
The principle of dominance states that alleles are always inherited in pairs from each parent.
The principle of dominance states that dominant alleles can never be masked by recessive alleles.
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What does the genotype 'BB' represent?
A homozygous recessive condition, meaning both alleles are recessive.
A heterozygous condition, meaning one allele is dominant and one is recessive.
A homozygous dominant condition, meaning both alleles are dominant.
A condition where one allele is absent.
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is the phenotype of the genotype 'DD'?
Recessive
Dominant
Incomplete dominance
Codominance
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