What does a capital letter, such as T represent in a Punnett square?

A. Heterozygous gene

B. Homozygous gene

C. Recessive gene

D. Dominant gene

D. Dominant gene I believe

D. Dominant gene is the correct answer.

Explanation:

a capital letter, such as T represent Dominant gene in a Punnett square.

A dominant gene is a fragment of DNA information which is used to produce chromosomes.

When a gene is dominant it is expressed.

The Punnett square used for prediction the genotypes of a specific breeding test.

In a Punnett square dominant gene is represented by a capital letter (T) and the recessive gene is represented by the lower letter (t).