Genetics Quiz on Drosophila

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Questions and Answers

What is the number of chromosomes in a somatic cell of Drosophila?

  • 8
  • 16 (correct)
  • 4
  • 32

What will be the number of chromosomes in the gametes of Drosophila?

  • 16
  • 32
  • 8 (correct)
  • 4

Which pairs of nitrogenous bases bond together in DNA according to the Watson and Crick model?

  • A with T and G with C (correct)
  • A with C and T with G
  • A with G and T with C
  • C with T and A with G

What happens to the chromosome number when an organism forms gametes through meiosis?

<p>It is reduced to half (C)</p> Signup and view all the answers

What is restored in the zygote after the fusion of male and female gametes?

<p>Complete hereditary material (D)</p> Signup and view all the answers

What is the primary outcome of meiosis compared to mitosis?

<p>Meiosis creates four daughter cells with a reduced chromosome number. (B)</p> Signup and view all the answers

Which statement accurately describes the difference between meiosis and mitosis?

<p>Mitosis retains the chromosome number while meiosis reduces it to half. (B)</p> Signup and view all the answers

In terms of cellular division, what is a characteristic unique to meiosis?

<p>Meiosis involves two distinct division phases. (B)</p> Signup and view all the answers

Why is mitosis essential for heredity control?

<p>Mitosis ensures that the chromosome number remains constant across generations. (C)</p> Signup and view all the answers

What type of cells does meiosis produce, and how does it differ from mitosis?

<p>Meiosis produces gametes, and mitosis produces somatic cells. (C)</p> Signup and view all the answers

What is the primary purpose of cell division in living organisms?

<p>To allow for growth, repair, and reproduction (B)</p> Signup and view all the answers

What must occur before a cell can divide during the cell division process?

<p>The genetic material must duplicate (C)</p> Signup and view all the answers

What can be a consequence of disruptions in the regulation of cell division?

<p>Development of genetic abnormalities (B)</p> Signup and view all the answers

Why is cell division tightly regulated in organisms?

<p>To ensure identical sets of chromosomes in daughter cells (C)</p> Signup and view all the answers

Which characteristic is essential for daughter cells resulting from cell division?

<p>They must be genetically identical to the parent cell. (B)</p> Signup and view all the answers

Flashcards

Drosophila somatic chromosomes

A somatic cell in Drosophila has 8 chromosomes.

Drosophila gamete chromosomes

Gametes in Drosphila have 4 chromosomes.

DNA Nucleotides

Four types of molecules (A, T, C, G) that form the building blocks of DNA.

DNA base pairing

A bonds with T, and G bonds with C in the DNA double helix.

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Meiosis and chromosome reduction

During gamete formation, the number of chromosomes halves in meiosis.

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Cell division

A process where a cell splits into two identical daughter cells.

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Daughter cells

The two new cells created during cell division, identical to the parent cell

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Genetic material

The DNA molecules containing the cell's instructions.

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Chromosome duplication

The process of making an exact copy of a cell's chromosomes.

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Cell regulation

Controlling cell division to ensure correct number of chromosomes.

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Meiosis

A cell division process creating four daughter cells with half the parent cell's chromosomes.

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Meiosis I & II

Two stages of meiosis, where the chromosomes are reduced to half the original amount.

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Mitosis vs. Meiosis

Mitosis creates two identical daughter cells, while meiosis creates four unique daughter cells with half the original chromosomes.

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Daughter cells

Cells produced after cell division.

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Chromosome reduction

Process in meiosis of reducing chromosome number to half the original number in the parent cell. Gametes are formed.

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