Genetics Review

Front

What are mutations in genetics?

Back

A change in the DNA of an organism that produces new traits.

Front

If black fur is dominant and white fur is recessive, what genotype would an organism with white fur have?

Back

ff

Front

What does heterozygous mean in genetics?

Back

When an organism has two different alleles for a trait (ex. Tt).

Front

What is homozygous recessive?

Back

An organism with two recessive alleles for a trait (ex. rr).

Front

What does the genotype 'Rr' indicate about an organism?

Back

The organism is heterozygous.

Front

Define dominant allele.

Back

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

Front

Define recessive allele.

Back

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

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup, while phenotype refers to the observable traits.

Front

What is a Punnett square used for?

Back

To predict the genetic outcomes of a cross between two organisms.

Front

What does it mean if an organism is purebred?

Back

It has two identical alleles for a trait (ex. RR or rr).