Podcast
Questions and Answers
What happens to chromatin prior to cell division?
What happens to chromatin prior to cell division?
- It is completely degraded and disappears.
- It transforms into ribosomes.
- It coils and condenses, forming distinct structures. (correct)
- It becomes more diffuse and less visible.
Who was the first scientist to study chromosomes in animals?
Who was the first scientist to study chromosomes in animals?
- Louis Pasteur
- Walther Flemming (correct)
- Gregory Mendel
- Charles Darwin
What is the name of the DNA-protein complex found in chromosomes?
What is the name of the DNA-protein complex found in chromosomes?
- Centromere
- Nucleosome
- Chromatids
- Chromatin (correct)
During which process did Walther Flemming observe chromosomes?
During which process did Walther Flemming observe chromosomes?
How do chromosomes appear under an electron microscope when the cell is not dividing?
How do chromosomes appear under an electron microscope when the cell is not dividing?
Flashcards
Chromatin
Chromatin
The long DNA molecule complexed with many proteins, found within the nucleus.
Chromosomes
Chromosomes
Discrete units of DNA found in the nucleus. They are visible under a microscope when the cell is dividing.
Mitosis
Mitosis
The process of cell division where the nucleus divides into two identical nuclei.
Chromatin Condensation
Chromatin Condensation
Signup and view all the flashcards
Walther Flemming
Walther Flemming
Signup and view all the flashcards
Study Notes
Chromosomes
- Chromosomes are structures within the nucleus containing most of a cell's DNA
- When stained, chromosomes are visible under a microscope
- Each chromosome contains one long DNA molecule associated with many proteins; this is called chromatin
- Chromatin is a very thin darkly stained fibre when a cell isn't dividing; as a cell prepares to divide, this chromatin coils and condenses into thick, separate chromosomes, which readily absorb color
- Chromosomes are ribbon-like structures.
Cell Cycle and Cell Division
- Cell division is a fundamental characteristic of life, maintaining life generation after generation, ensuring normal cell functions
- Through mitosis, body cells receive identical chromosome sets
- Mitosis involves evenly distributing duplicated chromosomes into daughter cells.
- Chromosomes in animal cells were first studied in 1882 by Walther Flemming, who observed them in rapidly dividing cells of salamander larvae.
- He called the process "mitosis," meaning "thread," for the lengthwise division of the threads
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
