Podcast
Questions and Answers
What are chromosomes composed of?
What are chromosomes composed of?
- Golgi apparatus
- Protein strands
- Chromatin fibers (correct)
- Nuclear membranes
Who first described chromosomes in 1875?
Who first described chromosomes in 1875?
- Strausberger (correct)
- Crick
- Watson
- Mendel
What makes chromosomes visible during cell division?
What makes chromosomes visible during cell division?
- Increased water content
- Nuclear expansion
- Folding and coiling of chromatin fibers (correct)
- Enzyme activity
What does the term 'chromosome' mean?
What does the term 'chromosome' mean?
When are chromosomes most easily counted?
When are chromosomes most easily counted?
Chromosomes are visible in active nucleus due to their high water content.
Chromosomes are visible in active nucleus due to their high water content.
The term 'chromosome' was first used by Strausberger in 1875.
The term 'chromosome' was first used by Strausberger in 1875.
Chromosomes were given the name chromosome due to their marked affinity for acidic dyes.
Chromosomes were given the name chromosome due to their marked affinity for acidic dyes.
Closely related species usually have different chromosome numbers.
Closely related species usually have different chromosome numbers.
Chromatin fibers undergo folding, coiling, and supercoiling during prophase to become thinner and larger.
Chromatin fibers undergo folding, coiling, and supercoiling during prophase to become thinner and larger.
Flashcards
Chromosome composition
Chromosome composition
Chromosomes are made of chromatin fibers.
Chromosome discoverer (early)
Chromosome discoverer (early)
Strausberger described chromosomes in 1875.
Chromosome visibility
Chromosome visibility
Chromosomes become visible during cell division due to chromatin coiling.
Chromosome meaning
Chromosome meaning
Signup and view all the flashcards
Best chromosome count time
Best chromosome count time
Signup and view all the flashcards
Chromosome water content
Chromosome water content
Signup and view all the flashcards
Strausberger's first use
Strausberger's first use
Signup and view all the flashcards
Chromosome dye affinity
Chromosome dye affinity
Signup and view all the flashcards
Related species chromosomes
Related species chromosomes
Signup and view all the flashcards
Chromatin fiber changes during prophase
Chromatin fiber changes during prophase
Signup and view all the flashcards
Study Notes
What are Chromosomes?
- Chromosomes are rod-shaped, filamentous bodies present in the nucleus.
- They become visible during cell division.
- Chromosomes are carriers of genes or units of heredity.
Characteristics of Chromosomes
- Chromosomes are not visible in an active nucleus due to their high water content.
- Chromosomes can be seen clearly during cell division.
History of Chromosomes
- Chromosomes were first described by Strausberger in 1875.
- The term "Chromosome" was first used by Waldeyer in 1888.
- Chromosomes were named due to their affinity for basic dyes (Chromo = colour; Soma = body).
Composition and Structure
- Chromosomes are composed of thin chromatin threads called Chromatin fibers.
- Chromatin fibers undergo folding, coiling, and supercoiling during prophase, making chromosomes thicker and smaller.
Number of Chromosomes
- The number of chromosomes can be counted easily during mitotic metaphase.
- Normally, all individuals of a species have the same number of chromosomes.
- Closely related species usually have similar chromosome numbers.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge about chromosomes with this quiz! Learn about the structure, function, and history of chromosomes, the carriers of genetic information.
