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Probability and Heredity Quiz

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Questions and Answers

Which of these genotypes is heterozygous?

Bb (correct)

Which of these is NOT a phenotype?

Round

Homozygous (correct)

Tall

Short

In a cross between individuals that are Aa×Aa, how many boxes of the Punnett square will show an offspring that is AA?

4 (correct)

Which of these is NOT a way to express probability?

¾ Signup and view all the answers

What does a Punnett square show?

All the possible outcomes of a genetic cross Signup and view all the answers

Which of these genotypes is homozygous?

AA Signup and view all the answers

What is the genotype for a trait?

Genotype for a trait Signup and view all the answers

What is an organism's physical appearance called?

Phenotype Signup and view all the answers

Which of these is a way to express probability?

50 percent Signup and view all the answers

What does a Punnett square show?

All the possible outcomes of a genetic cross Signup and view all the answers

Study Notes

Genotype and Phenotype

A genotype is heterozygous when it has two different alleles for a trait, e.g., Aa.
An organism's physical appearance is called its phenotype.
The genotype of a trait is the specific set of alleles an individual possesses.

Punnett Square

A Punnett square is a graphical representation of the possible genotypes of offspring from a cross between two parents.
A Punnett square shows the probability of different genotypes and phenotypes in offspring.

Probability

Probability can be expressed as a decimal, percentage, or ratio.
Probability cannot be expressed as a sentence or a word.

Genotype Combinations

In a cross between Aa × Aa individuals, only one box of the Punnett square will show an offspring that is AA.

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Description

Test your knowledge on probability and heredity with this grade 7 quiz. Answer questions on genotypes, phenotypes, and Punnett squares to see how well you understand these concepts.