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Multiple Choice
Which statement is true regarding homologous chromosomes?
A
They are identical copies of each other.
B
They carry the same genes but may have different alleles.
C
They are always attached to each other during cell division.
D
They are found only in prokaryotic cells.
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 structure and carry the same genes at the same loci, but they may have different alleles.
Identify the incorrect statement: 'They are identical copies of each other.' Homologous chromosomes are similar but not identical; they can have different alleles for the same genes.
Evaluate the statement: 'They carry the same genes but may have different alleles.' This is true because homologous chromosomes have the same genes but can have variations in the alleles.
Consider the statement: 'They are always attached to each other during cell division.' This is incorrect because homologous chromosomes are not always attached; they pair up during meiosis but separate during anaphase.
Analyze the statement: 'They are found only in prokaryotic cells.' This is false because prokaryotic cells do not have homologous chromosomes; they are characteristic of eukaryotic cells.