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Question
How many of the following statements are correct?
I. Three scientists independently rediscovered Mendel’s work.
II. Coloured bodies called lysosomes can be visualised inside the nucleus by staining cells.
III. By 1890, the chromosome movement during meiosis had been studied.
IV. Mitosis is a kind of equational division and meiosis is reductional division.
V. Chromosomes and genes occur in pairs.
VI. Two alleles of a gene are located on a homologous site on homologous chromosomes.
How many of the following statements are correct?
I. Three scientists independently rediscovered Mendel’s work.
II. Coloured bodies called lysosomes can be visualised inside the nucleus by staining cells.
III. By 1890, the chromosome movement during meiosis had been studied.
IV. Mitosis is a kind of equational division and meiosis is reductional division.
V. Chromosomes and genes occur in pairs.
VI. Two alleles of a gene are located on a homologous site on homologous chromosomes.
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Solution
The correct option is D 4
- In 1900, three scientists (de Vries, Correns and von Tschermak) independently rediscovered Mendel’s work.
- Coloured bodies called chromosomes found inside the nucleus can be visualized by staining. Lysosomes are cell organelles found in the cytoplasm outside the nucleus.
- By 1902, chromosomal movement during meiosis had been worked and studied due to advancement in microscopy.
- Mitosis is a kind of equational division as the number of chromosomes remains same in parent cell and daughter cells. Meiosis is a reductional division where daughter cells have half the number of chromosomes compared to the parent cell.
- Chromosomes and genes occur in pairs.
- Two alleles of a gene are located on a homologous site on homologous chromosomes.
Hence, statements I, IV, V and VI are correct.
- In 1900, three scientists (de Vries, Correns and von Tschermak) independently rediscovered Mendel’s work.
- Coloured bodies called chromosomes found inside the nucleus can be visualized by staining. Lysosomes are cell organelles found in the cytoplasm outside the nucleus.
- By 1902, chromosomal movement during meiosis had been worked and studied due to advancement in microscopy.
- Mitosis is a kind of equational division as the number of chromosomes remains same in parent cell and daughter cells. Meiosis is a reductional division where daughter cells have half the number of chromosomes compared to the parent cell.
- Chromosomes and genes occur in pairs.
- Two alleles of a gene are located on a homologous site on homologous chromosomes.
Hence, statements I, IV, V and VI are correct.
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