Biology 10th Chapter: Cell Division and Chromosome Structure

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Questions and Answers

What do chromatids revert to after cell division?

Chromatin fibres

What is the function of a centromere during cell division?

To attach the chromosomes with spindle fibres and detach sister chromatids during anaphase.

What are genes?

Specific sequences of nucleotides on a chromosome that encode proteins

What is a chromatid?

<p>One vertical half of a duplicated chromosome</p> Signup and view all the answers

What are sister chromatids?

<p>Two identical chromatids joined by a centromere</p> Signup and view all the answers

What is the function of genes?

<p>To transfer hereditary units from parents to offspring</p> Signup and view all the answers

What biological evidence can be obtained from blood or semen stains found at a crime scene?

<p>DNA fingerprinting</p> Signup and view all the answers

What is the structure that DNA strand wound around a histone octamer forms?

<p>Nucleosome</p> Signup and view all the answers

Why do new cells need to be produced?

<p>For growth, replacement, repair, and reproduction</p> Signup and view all the answers

What is the function of cell division in growth?

<p>Essential for forming tissues and organs</p> Signup and view all the answers

Why is cell division important for replacement?

<p>To replace cells destroyed during normal body functions</p> Signup and view all the answers

What is the specific sequence of nucleotides on a chromosome that constitutes a gene?

<p>Temes</p> Signup and view all the answers

How are new cells formed in the bone marrow?

<p>Through a division of their parent cells</p> Signup and view all the answers

What happens to old and dried leaves in plants?

<p>They fall off and new ones grow out</p> Signup and view all the answers

How are accidental injuries like cuts in the skin or fractures in bones repaired?

<p>Through cells that divide, cover up the gaps, and join the broken ends</p> Signup and view all the answers

What is the term for the type of cell division that occurs in all body cells except in oocytes and spermatocytes?

<p>Mitosis</p> Signup and view all the answers

What remains the same in terms of chromosomes during cell division for growth, replacement, and repair?

<p>The number of chromosomes</p> Signup and view all the answers

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