Basic Genetics

Front

What is a phenotype?

Back

The physical trait of an organism.

Front

One form of a gene is called_______________

Back

an allele.

Front

What does Tt represent in genetics?

Back

It is heterozygous.

Front

What does having two different genes for a trait mean?

Back

It is called heterozygous.

Front

If brown fur color is dominant over black fur color, what is the genotype of offspring from AA x aa?

Back

Aa.

Front

What is a genotype?

Back

The genetic makeup of an organism.

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous has two identical alleles, while heterozygous has two different alleles.

Front

What does dominant mean in genetics?

Back

A dominant allele is one that expresses its trait even in the presence of a recessive allele.

Front

What is a recessive allele?

Back

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

Front

What is the purpose of a Punnett square?

Back

To predict the genotypes of offspring from a genetic cross.