Genetics Review

Front

What is a carrier in genetics?

Back

An individual who has one dominant and one recessive allele for a trait, but does not express the trait.

Front

What does a filled square represent in a pedigree chart?

Back

An affected male.

Front

What do half-colored symbols represent in a pedigree chart?

Back

The individual is a carrier (heterozygous).

Front

What does heterozygous mean?

Back

Having two different alleles for a particular gene.

Front

In genetics, what does the term 'dominant' refer to?

Back

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

Front

What does the term 'recessive' mean in genetics?

Back

An allele that only expresses its trait when two copies are present.

Front

What is the genotype of a red-flowering plant if red (R) is dominant over white (r)?

Back

RR or Rr.

Front

What is a phenotype?

Back

The observable characteristics or traits of an individual.

Front

What is a genotype?

Back

The genetic makeup of an individual, represented by alleles.

Front

What is a Punnett square used for?

Back

To predict the genotypes and phenotypes of offspring from a genetic cross.