Question

Define homozygous trait.

Answer 1

Traits refer to any genetically determined characteristic. It is a specific characteristic of an organism. Traits can be determined by genes or environments and interactions between them.

Complete answer:
Individual organisms carrying two identical alleles are called homozygous.Homozygous traits are the traits which are formed when the same kind of two alleles are associated and when different kinds of two alleles are associated to form a trait is called a heterozygous trait.A homozygous individual can carry either dominant or recessive allele but not both. A heterozygous individual carries one dominant and recessive allele.The humans have two alleles at each locus with one allele inherited from each parent. so they are called as diploid organismsAn allele can either be dominant or recessive
An allele that expresses a trait if there is only one copy are called as dominant and the other that express themselves if there are two copies are called as recessive.
Homozygous examples

Eye colour -The alleles for blue eyes are recessive. You need to have two identical blue eye alleles for blue eyes.
Phenylketonuria occurs when a person is homozygous for phenylalanine hydroxylase gene mutation.

Note: The inheritable unit that influences a trait is called a gene. Gene is part of chromosome.An allele is a variant form of gene. Different phenotypic traits are due to different forms of genes or allele which arises due to mutation and then passes on the future generations.