Inheritance Review

Front

What is Incomplete Dominance?

Back

A genetic situation where one allele does not completely dominate another allele, resulting in a phenotype that is a blend of the two traits.

Front

What is Co-Dominance?

Back

A genetic scenario where both alleles in a heterozygote are fully expressed, resulting in offspring with a phenotype that shows both traits distinctly.

Front

What is a Dominant Allele?

Back

An allele that expresses its phenotype even in the presence of a recessive allele.

Front

What is a Recessive Allele?

Back

An allele that is masked by the presence of a dominant allele and only expresses its phenotype when homozygous.

Front

Define Homozygous Dominant.

Back

An organism with two identical dominant alleles for a trait (e.g., AA).

Front

Define Homozygous Recessive.

Back

An organism with two identical recessive alleles for a trait (e.g., aa).

Front

Define Heterozygous.

Back

An organism with two different alleles for a trait (e.g., Aa).

Front

What is a Punnett Square?

Back

A diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles.

Front

What percentage of offspring are homozygous recessive in a typical Mendelian cross of two heterozygous parents?

Back

25%.

Front

What is the phenotypic ratio of a monohybrid cross between two heterozygous parents?

Back

3:1 (dominant:recessive).