5 Questions
Describe the structure of chromosomes and the role of centromeres in cell division.
Chromosomes are linear arrangements of condensed DNA and histone proteins, forming a complex called chromatin. The centromere is a chromosomal region where sister chromatids are held together until anaphase. It contains tandem CEN repeats that bind an alternative histone variant (CENH3), to which kinetochore is attached.
What are homologous chromosomes and how do they differ from each other?
Homologous chromosomes are a set of one maternal and one paternal chromosome that pair up with each other inside a cell during fertilization. They have slight differences in their genetic information, allowing each gamete to have a unique genetic makeup.
Are homologous chromosomes identical? Explain.
No, homologous chromosomes are not identical. They contain slight differences in their genetic information, allowing each gamete to have a unique genetic makeup.
What is the origin of homologous chromosomes in an organism?
One homologous chromosome is inherited from the organism's mother, and the other is inherited from the organism's father.
How are the differences in homologous chromosomes represented?
The differences in homologous chromosomes are represented by alleles.
Test your knowledge about cell division and its regulation with this quiz. Topics include chromosome structure, mitosis, meiosis, and eukaryotic life cycles.
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