Punnett Square Credit Genetics and Punnett squares

Front

Lowercase letter; trait hidden when paired with dominant allele

Back

Recessive

Front

Look at the Punnett square. What is the percent chance of having the recessive Phenotype (trait)?

Back

50%

Front

Capital letter; trait is always shown

Back

Dominant

Front

Whose traits are on the outside (top and side) of the Punnett square?

Back

Parents

Front

Look at the Punnett square. What percent of the offspring are homozygous dominant?

Back

0%

Front

What is a Punnett square used for?

Back

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

Front

What does homozygous mean?

Back

Having two identical alleles for a trait.

Front

What does heterozygous mean?

Back

Having two different alleles for a trait.

Front

What is the genotype of an organism?

Back

The genetic makeup of an organism.

Front

What is the phenotype of an organism?

Back

The physical appearance or observable traits of an organism.