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Multiple Choice
Which of the following sets of structures are considered homologous chromosomes?
A
Two chromosomes that are identical copies of each other
B
A chromosome and its replicated sister chromatid
C
A pair of chromosomes, one from each parent, that carry the same genes in the same order
D
Two chromosomes that determine different traits
Verified step by step guidance
1
Understand the concept of homologous chromosomes: Homologous chromosomes are pairs of chromosomes that have the same structure and carry the same genes in the same order, but may have different alleles. Each pair consists of one chromosome from each parent.
Identify the characteristics of homologous chromosomes: They are similar in size, shape, and gene content, but are not identical copies. They carry genes for the same traits, but the alleles for those traits may differ.
Evaluate the options given: Analyze each option to determine if it fits the definition of homologous chromosomes.
Option analysis: 'Two chromosomes that are identical copies of each other' refers to sister chromatids, not homologous chromosomes. 'A chromosome and its replicated sister chromatid' also refers to sister chromatids. 'Two chromosomes that determine different traits' do not fit the definition of homologous chromosomes.
Select the correct option: 'A pair of chromosomes, one from each parent, that carry the same genes in the same order' fits the definition of homologous chromosomes, as they are similar in structure and gene content, but come from different parents.