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Multiple Choice
Which of these structures are most likely homologous chromosomes?
A
A single chromosome with duplicated DNA
B
A pair of chromosomes with completely different genes
C
A pair of chromosomes with the same genes but possibly different alleles
D
Two chromosomes from different species
Verified step by step guidance
1
Understand the concept of homologous chromosomes: Homologous chromosomes are pairs of chromosomes in a diploid organism that have the same genes at the same loci, but they may have different alleles.
Analyze the options given: A single chromosome with duplicated DNA is not a pair, so it cannot be homologous chromosomes.
Consider the second option: A pair of chromosomes with completely different genes cannot be homologous because homologous chromosomes must have the same genes.
Evaluate the third option: A pair of chromosomes with the same genes but possibly different alleles fits the definition of homologous chromosomes, as they have the same genes but can have different versions (alleles) of those genes.
Review the last option: Two chromosomes from different species cannot be homologous because homologous chromosomes are found within the same species.