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Questions and Answers
What is the function of the centromere in a chromosome?
What is the function of the centromere in a chromosome?
- It supports the structure of the chromosome.
- It separates chromatids during cell division.
- It binds sister chromatids together. (correct)
- It packages DNA into a chromosome.
What do we call a single chromosome before it is duplicated?
What do we call a single chromosome before it is duplicated?
- Chromatid (correct)
- Centromere
- Centrioles
- Sister chromatid
How many chromatids are present during the initial state of cell division when chromosomes are duplicated?
How many chromatids are present during the initial state of cell division when chromosomes are duplicated?
- 46 chromatids
- 23 chromatids
- 92 chromatids (correct)
- 69 chromatids
Which part of the chromosome is known as the short arm?
Which part of the chromosome is known as the short arm?
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What is the role of centrioles in cell function?
What is the role of centrioles in cell function?
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Study Notes
Chromosome Structure
- Chromosomes are composed of a short arm (p arm), a long arm (q arm), and a centromere.
- The centromere connects the two arms and acts as the attachment point for spindle fibers during cell division.
- The arms contain DNA, which is organized into genes that carry genetic information.
Chromosome and Chromatids
- A chromosome is a packaged structure of DNA.
- A chromatid refers to a single copy of a chromosome.
- Two identical chromatids, called sister chromatids, are joined by a centromere.
Sister Chromatids
- Sister chromatids separate during cell division, ensuring that each daughter cell receives a complete set of chromosomes.
Centromere
- The centromere is a constricted region of a chromosome that holds sister chromatids together.
- It plays a crucial role in chromosome movement during cell division.
Centrioles
- Centrioles are short microtubules arranged in an open-ended cylinder.
- They function in pairs and play a key role in cell movement.
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Description
Explore the essential components of chromosome structure, including arms, centromeres, and sister chromatids. This quiz delves into the roles these structures play during cell division and their overall importance in genetics.
