Question

Although the exact number of genes in human DNA is unknown, scientists

estimate the number to be around 20,000 to 25,000.

Which of the following is true about these genes?

A.) There is only one variation, or allele, of each gene.

B .) There are several variations, or alleles, of many genes.

C.) Each human has the exact

D.) same combination of alleles.
Each human has completely different genes and alleles.

Answer 1

B

Step-by-step explanation:

There are several variations, or alleles, of many genes.