Genetics Test Review

Front

What is the definition of a dominant allele?

Back

A dominant allele is an allele that expresses its trait even when only one copy is present in the genotype.

Front

What is the definition of a recessive allele?

Back

A recessive allele is an allele that only expresses its trait when two copies are present in the genotype.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene, such as TT or tt.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene, such as Tt.

Front

What is a Punnett Square used for?

Back

A Punnett Square is a diagram used to predict the genetic makeup of offspring from two parents.

Front

What is the probability of an offspring being purple if the genotype is PP?

Back

100% probability of being purple.

Front

What is the probability of an offspring being purple if the genotype is Pp?

Back

50% probability of being purple.

Front

What is the probability of an offspring being purple if the genotype is pp?

Back

0% probability of being purple.

Front

What is the genotype of a plant that is homozygous dominant for purple color?

Back

The genotype is PP.

Front

What is the genotype of a plant that is heterozygous for purple color?

Back

The genotype is Pp.