Chapter 12 Genetics

Front

What is a recessive allele?

Back

A recessive allele is an allele that is only expressed in the phenotype when two copies are present, meaning no dominant allele is present.

Front

What does the Law of Dominance state?

Back

The Law of Dominance states that in a heterozygote, one allele may conceal the presence of another allele.

Front

What genotype would produce a recessive phenotype?

Back

hh (homozygous recessive) produces a recessive phenotype.

Front

What is a Punnett Square used for?

Back

A Punnett Square is used to predict the possible genetic outcomes of offspring from a genetic cross.

Front

What is incomplete dominance?

Back

Incomplete dominance is a genetic situation in which one allele does not completely dominate another allele, resulting in a new phenotype.

Front

What is codominance?

Back

Codominance is a genetic scenario where both alleles in a heterozygote are fully expressed, resulting in a phenotype that shows both traits.

Front

Define genotype.

Back

Genotype refers to the genetic makeup of an organism, specifically the alleles it possesses.

Front

Define phenotype.

Back

Phenotype refers to the observable characteristics or traits of an organism, which result from the interaction of its genotype with the environment.

Front

What is a homozygous genotype?

Back

A homozygous genotype has two identical alleles for a particular gene, either dominant (AA) or recessive (aa).

Front

What is a heterozygous genotype?

Back

A heterozygous genotype has two different alleles for a particular gene (e.g., Aa).