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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? A. homologous chromosomes with heterozygous alleles B. homologous chromosomes with homozygous alleles C. heterozygous chromosomes with heterozygous alleles D. heterozygous chromosomes with homozygous alleles



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A. homologous chromosomes with heterozygous alleles

The correct answer is A. Homologous chromosomes with heterozygous alleles.

If the alleles of genes are different then the scientist is observing for homologous chromosomes with heterozygous alleles.

In each homologous pair there is one chromosome which comes from maternal chromosome and the other one from paternal chromosome.

Homologous chromosomes are not identical but they are similar. Alleles for each homologous chromosome is not same but genes are the same.

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