Chromosomes in Metaphase: Identifying Replicated Structures
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Questions and Answers

What are the two distinctive features found in chromosomes?

  • Centrioles and telomeres
  • Ribosomes and lysosomes
  • Centromeres and kinetochores
  • Centromeres and telomeres (correct)

What is the function of centromeres during cell division?

  • Bind to microtubules and transport chromosomes (correct)
  • Store genetic information for cell replication
  • Are involved in protein synthesis
  • Act as energy centers for the cell

How do metaphase chromosomes with centromeres appear under the microscope?

  • As single, circular entities
  • As elongated structures
  • With multiple centromeres
  • With visible primary constrictions (correct)

Where is the centromere located in a metacentric chromosome?

<p>Near the middle of the chromosome (B)</p> Signup and view all the answers

What is the role of telomeres in chromosomes?

<p>Maintain chromosome length during replication (A)</p> Signup and view all the answers

In which type of centromere is no single centromere defined and the entire chromosome acts as the centromere?

<p>Holocentric (D)</p> Signup and view all the answers

How can chromosomal structure influence whether genes are active or silent?

<p>By affecting the proteins required for chromosome movement (A)</p> Signup and view all the answers

What process requires many proteins that interact with microtubules?

<p>Mitosis (B)</p> Signup and view all the answers

How does polyploidy usually arise?

<p>From changes in whole sets of chromosomes (B)</p> Signup and view all the answers

Which aspect of cell division involves moving chromosomes towards the poles?

<p>Anaphase (D)</p> Signup and view all the answers

What is the main focus of karyotyping?

<p>Describing chromosome number and structure (A)</p> Signup and view all the answers

Which process involves a duplication of DNA without subsequent cell division?

<p>Endoreduplication (A)</p> Signup and view all the answers

What is a karyogram used for in genetics?

<p>Determining an individual's karyotype (C)</p> Signup and view all the answers

What is the term used to describe the two sister chromatids of a replicated chromosome?

<p>Tetrad (A)</p> Signup and view all the answers

How are autosomes different from sex chromosomes?

<p>Autosomes have different lengths, centromere locations, and banding patterns (A)</p> Signup and view all the answers

What characteristic feature of human chromosomes led to their naming convention?

<p>Length differences (D)</p> Signup and view all the answers

Why do human males have one X and one Y chromosome in their karyotype?

<p>To determine biological sex (D)</p> Signup and view all the answers

What do characteristic banding patterns on chromosomes help geneticists distinguish?

<p>Chromosomal regions (C)</p> Signup and view all the answers

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