Basic Genetics

Front

What is the genotype for a yellow plant if G = green and g = yellow?

Back

gg

Front

Which genotype represents a homozygous condition?

Back

bb

Front

What does it mean to be homozygous?

Back

Having two of the same genes for a trait (sometimes called purebred).

Front

What does it mean to be heterozygous?

Back

Having two different genes for a trait (sometimes called hybrid).

Front

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

Back

Aa

Front

What is a genotype?

Back

The genetic makeup of an organism, represented by letters (e.g., AA, Aa, aa).

Front

What is a phenotype?

Back

The physical appearance or observable traits of an organism.

Front

What does dominant mean in genetics?

Back

A dominant trait is one that will appear in the phenotype even if only one copy of the gene is present.

Front

What does recessive mean in genetics?

Back

A recessive trait is one that will only appear in the phenotype if two copies of the gene are present.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup, while phenotype refers to the physical expression of that makeup.