Questions and Answers
Which type of histone protein doesn’t count toward histone octamer?
Synapsis occur in
Which group of chromosomes have only metacentric
From these given cells spermatogonium, spermatozoa, primary spermatocyte, secondary spermatocyte, spermatid how many of them have the number of chromosomes equal to the ovum’s
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A 50-year-old woman is pregnant. The doctor found that there is a risk of abnormalities in the baby’s chromosome. Which of the following cells is the most suitable for chromosome analysis
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What substance act as mitosis stimulation in lymphocyte culture for karyotyping
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Which of the following incorrect about this picture
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Which of the following correct about this picture
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Interphase is a period corresponding to the cell cycle phases of
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Chromatids joined together by a centromere are called
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Study Notes
Histone Proteins
- H1 histone protein does not count towards the histone octamer structure.
Synapsis
- Synapsis occurs during prophase I of meiosis, where homologous chromosomes pair up and exchange genetic material.
Chromosome Types
- Metacentric chromosomes have their centromere located at or near the center of the chromosome, giving them two arms of equal length.
Chromosome Count in Germ Cells
- Among spermatogonium, spermatozoa, primary spermatocyte, secondary spermatocyte, and spermatid, only spermatozoa and spermatid have a chromosome number equal to the ovum (haploid, n).
Chromosome Analysis in Pregnancy
- For a 50-year-old pregnant woman at risk of chromosomal abnormalities, the most suitable cells for chromosome analysis would be amniocytes, which are obtained through amniocentesis.
Mitosis Stimulation in Lymphocytes
- Phytohemagglutinin (PHA) is commonly used as a mitosis stimulant in lymphocyte culture for karyotyping purposes.
Image Analysis
- Without context about the picture, it’s not possible to distinguish which statement is incorrect or correct regarding the image.
Interphase and Cell Cycle
- Interphase corresponds to the growth and DNA replication phases of the cell cycle: G1, S, and G2 phases.
Chromatid Structure
- Chromatids that are joined together by a centromere are referred to as sister chromatids.
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Description
Test your knowledge on histone proteins, specifically which type of histone protein does not contribute to the histone octamer structure. Explore the functions and significance of histones in DNA packaging and gene regulation.
