Genotype, Phenotype, & Punnett Squares

Front

What is a genotype?

Back

The genetic makeup of an organism, represented by the alleles it possesses (e.g., Aa, TT).

Front

What is a phenotype?

Back

The physical appearance or observable traits of an organism resulting from its genotype.

Front

What does dominant mean in genetics?

Back

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

Front

What does recessive mean in genetics?

Back

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

Front

What is a Punnett square?

Back

A diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles from the parents.

Front

What is the purpose of a Punnett square?

Back

To determine the probability of an offspring inheriting particular traits based on the genotypes of the parents.

Front

If T = tall and t = short, what is the phenotype of TT?

Back

Tall.

Front

If T = tall and t = short, what is the phenotype of Tt?

Back

Tall.

Front

If T = tall and t = short, what is the phenotype of tt?

Back

Short.

Front

What is a homozygous genotype?

Back

A genotype consisting of two identical alleles for a trait (e.g., TT or tt).