Mouse Genetics Gizmo Lesson 1.3 Review

Front

What are alleles?

Back

Alleles are different forms of a gene that can exist at a specific locus on a chromosome.

Front

What does it mean for an organism to be homozygous?

Back

An organism is homozygous when it has two identical alleles for a particular gene.

Front

What does it mean for an organism to be heterozygous?

Back

An organism is heterozygous when it has two different alleles for a particular gene.

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses.

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

What is the significance of the F and f alleles in mouse genetics?

Back

F represents the dominant allele for a trait, while f represents the recessive allele.

Front

What is a Punnett square?

Back

A Punnett square is a diagram used to predict the genetic outcomes of a cross between two organisms.

Front

What is the expected genotype ratio from a cross between FF and ff mice?

Back

The expected genotype ratio is 100% Ff.

Front

What is the expected phenotype ratio from a cross between Ff and Ff mice?

Back

The expected phenotype ratio is 3:1 (dominant:recessive).

Front

What does it mean for a trait to be dominant?

Back

A dominant trait is one that is expressed in the phenotype even when only one copy of the allele is present.