Multiple Choice
Which of the following represents a homologous chromosome pair?
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12. Meiosis
Homologous Chromosomes
Multiple Choice
How are sister chromatids and homologous chromosomes different from each other?
A
Sister chromatids are identical copies of a single chromosome, while homologous chromosomes are pairs of chromosomes that have the same genes but may have different alleles.
B
Sister chromatids are involved in crossing over during meiosis, while homologous chromosomes are not.
C
Sister chromatids are pairs of chromosomes that have the same genes but may have different alleles, while homologous chromosomes are identical copies of a single chromosome.
D
Sister chromatids are found only in prokaryotic cells, while homologous chromosomes are found only in eukaryotic cells.
Verified step by step guidance1
Begin by understanding the basic definitions: Sister chromatids are identical copies of a single chromosome, formed during DNA replication. Homologous chromosomes are pairs of chromosomes, one from each parent, that have the same genes but may contain different alleles.
Consider the role of sister chromatids and homologous chromosomes during cell division: Sister chromatids are involved in both mitosis and meiosis, where they are separated into daughter cells. Homologous chromosomes pair up during meiosis I and can undergo crossing over, exchanging genetic material.
Clarify the genetic composition: Sister chromatids are genetically identical, as they are copies of the same chromosome. Homologous chromosomes have the same genes but can have different alleles, contributing to genetic diversity.
Address the cellular context: Sister chromatids are present in both prokaryotic and eukaryotic cells during cell division. Homologous chromosomes are specific to eukaryotic cells, as they involve the pairing of chromosomes from two parents.
Summarize the key differences: Sister chromatids are identical copies involved in cell division, while homologous chromosomes are pairs that contribute to genetic variation through meiosis. They differ in their genetic composition and cellular roles.
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