The shown image is a pair of chromosomes with one having A/A on top of the short arms and the other having a/a on the same relative position. This suggests that the pair of chromosomes are homologous.
Study the image shown below. Which of the following statements are true?
A. Sister chromatids always have the same alleles.
B. These homologous chromosomes have different alleles.
C. Gene A is at the same locus on all four chromatids.
D. Allele A has two genes.