Question

this passage describes the scale type trait in common carp: carp are large freshwater fish that are often raised for food. before a carp is cooked, its scales are usually removed. normally, carp are covered in small scales arranged in straight rows. but carp with mirror scales have large scales arranged in scattered patches. because mirror scales do not cover the fishs entire body, carp with mirror scales are easier to prepare for cooking. in a group of common carp, some individuals have normal scales and others have mirror scales. in this group, the gene for the scale type trait has two alleles. the allele a is for normal scales, and the allele a is for mirror scales. a certain common carp is from this group. this common carps phenotype for the scale type trait is normal scales. this carps genotype for the scale type gene is aa. based on this information, complete the following statement. this common carp is for the scale type gene. homozygous heterozygous

Explanation:

In genetics, an organism is homozygous for a gene when it has two identical alleles. Here, the carp has the genotype AA for the scale - type gene, meaning it has two identical alleles (both A), so it is homozygous.

Answer:

homozygous