Punnett Squares

Front

What is a Punnett Square?

Back

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

Front

What do the letters G and g represent in genetics?

Back

In genetics, uppercase letters (like G) typically represent dominant alleles, while lowercase letters (like g) represent recessive alleles.

Front

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

Back

gg

Front

What is the phenotype of a plant?

Back

The phenotype is the physical appearance or observable traits of an organism.

Front

In a Punnett Square, where are the parent alleles written?

Back

The parent alleles are written outside of the boxes, on the top and left side.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene (e.g., GG or gg).

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene (e.g., Gg).

Front

If T = tall and t = short, what is the genotype for a short plant?

Back

tt

Front

What is the purpose of a Punnett Square?

Back

The purpose of a Punnett Square is to predict the probability of an offspring inheriting particular traits from its parents.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup of an organism, while phenotype refers to the physical expression of those genes.