Punnett Square Challenge

Row 1

100

The physical appearance resulting from a genotype.

Phenotype

200

A distinct version of a gene.

Allele

300

Another word for a heterozygous organism.

Hybrid

400

Chance of recessive offspring from TT x tt.

Zero Percent

500

Chance of heterozygous offspring from TT x tt.

100%

Row 2

100

Chance of recessive phenotype from Tt x Tt.

25%

200

Chance of dominant phenotype from Tt x Tt.

75%

300

The letters inside the boxes represent this generation.

Offspring

400

The letters placed on the outside of the square represent these.

Parents

500

Grid diagram predicting offspring genotype probabilities.

Punnett Square

Row 3

100

A capital letter (e.g., T) represents this type of allele.

Dominant

200

A lowercase letter (e.g., t) represents this type of allele.

Recessive

300

Two identical letters (e.g., TT or tt).

Homozygous

400

Two different letters (e.g., Tt).

Heterozygous

500

The specific combination of letters an organism has.

Genotype