BIO 3B.1 Law of Dominance

Front

What does it mean if an organism has two identical alleles for a trait?

Back

The organism is homozygous for that trait.

Front

What is the term for the observable characteristics of an organism?

Back

Phenotype.

Front

What is the term for the genetic makeup of an organism?

Back

Genotype.

Front

What is a gene?

Back

A sequence of DNA that codes for a protein and determines a trait.

Front

What does it mean for an allele to be dominant?

Back

It means that the trait it represents will be expressed in the phenotype even if only one copy is present.

Front

What does it mean for an allele to be recessive?

Back

It means that the trait it represents will only be expressed in the phenotype if two copies are present.

Front

If brown eyes (B) are dominant over blue eyes (b), what is the genotype of a person with blue eyes?

Back

The genotype is bb.

Front

What is a trait?

Back

A specific characteristic of an organism, such as color or shape.

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous means having two identical alleles for a trait, while heterozygous means having two different alleles.

Front

If a baby has the genotype Bb, what is their phenotype regarding eye color?

Back

The phenotype is brown eyes.