Question

The two copies or forms of a gene for one trait are called

Answer 1

Answer:

The two copies or forms of a gene for one trait are called alleles.

Explanation:

• Alleles of a gene are formed due to a mutation at same locus of chromosome.
• Alleles can be a) dominant,

                                 b)recessive or

                                  c) null alleles.

• A dominant allele always expresses itself in the phenotype and masks the effect of recessive allele.
• The recessive allele could express itself only in the absence of dominant allele.
• A null allele is the one that lacks the normal gene function.