In This Video "RSSB Stenographer 2024 || Chromosome (गुणसूत्र ) || 2 सवाल पक्के || By Pathak sir "
Chromosomes are thread-like structures found in the nucleus of cells. They are composed of DNA and proteins, and they contain the genetic material that is passed from one generation to the next.
Key points about chromosomes:
🔹 Structure: Chromosomes are made up of DNA, which is coiled around proteins called histones.
🔹 Number: Humans have 46 chromosomes, arranged in 23 pairs.
🔹 Types: Chromosomes can be classified as autosomes (pairs 1-22) and sex chromosomes (pair 23).
🔹 Functions: Chromosomes carry genes, which are the units of heredity. Genes control the traits of an organism.
🔹 Meiosis: During meiosis, chromosomes are divided equally between the daughter cells, ensuring that each cell receives a complete set of chromosomes.
Important concepts related to chromosomes:
🔹 Karyotype: A visual representation of the complete set of chromosomes in a cell.
🔹 Chromosomal abnormalities: These can occur when there is an extra chromosome, a missing chromosome, or a structural abnormality in a chromosome.
🔹 Genetic disorders: Many genetic disorders are caused by chromosomal abnormalities.
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Негізгі бет RSSB Stenographer 2024 || 📕 Chromosome (गुणसूत्र )📕 || 2 सवाल पक्के || By Pathak sir
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