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Biology 10th Chapter: Cell Division and Chromosome Structure

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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?

One vertical half of a duplicated chromosome Signup and view all the answers

What are sister chromatids?

Two identical chromatids joined by a centromere Signup and view all the answers

What is the function of genes?

To transfer hereditary units from parents to offspring Signup and view all the answers

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

DNA fingerprinting Signup and view all the answers

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

Nucleosome Signup and view all the answers

Why do new cells need to be produced?

For growth, replacement, repair, and reproduction Signup and view all the answers

What is the function of cell division in growth?

Essential for forming tissues and organs Signup and view all the answers

Why is cell division important for replacement?

To replace cells destroyed during normal body functions Signup and view all the answers

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

Temes Signup and view all the answers

How are new cells formed in the bone marrow?

Through a division of their parent cells Signup and view all the answers

What happens to old and dried leaves in plants?

They fall off and new ones grow out Signup and view all the answers

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

Through cells that divide, cover up the gaps, and join the broken ends 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?

Mitosis Signup and view all the answers

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

The number of chromosomes Signup and view all the answers