A scientist observes a pair of separate chromosomes that have genes for the same trait arranged in the same order. However, some of the alleles for the genes are different. What is the scientist most likely observing?
homologous chromosomes with heterozygous alleles
homologous chromosomes with homozygous alleles
heterozygous chromosomes with heterozygous alleles
heterozygous chromosomes with homozygous alleles
