Question

edpuzzle
locus for hair gene
multiple-choice question
what is an allele?
it is your dna strand
it is a form of a gene often represented by a number.
it is the nucleus of all your cells.
it is a form of a gene often represented by a letter
rewatch

Explanation:

An allele is a variant form of a gene that occupies the same locus on homologous chromosomes. It is typically represented by letters (e.g., dominant allele A, recessive allele a) rather than numbers. DNA strands and cell nuclei are unrelated to the definition of an allele.

Answer:

It is a form of a gene often represented by a letter