https://www.vetnurse.co.uk/nursing/w/vet-nurse-revision_1/412/terms-and-definitionsWelcome to the Revision Guide for Student Nurses (Part I) by Vanessa Bird VN. This guide contains notes, self-test questionnaires and practical tasks to help you through your exams (Level 2 NVQ), and to use as a reference afterwards.April 2009. Importen-USTelligent Community 10https://www.vetnurse.co.uk/nursing/w/vet-nurse-revision_1/412/terms-and-definitionsFri, 27 Feb 2009 07:30:54 GMT1a0763ec-3885-442c-853e-6cef656dfec5:9bb47572-93f9-4a56-aacd-08d92d5489e6Arlo Guthriehttps://www.vetnurse.co.uk/nursing/w/vet-nurse-revision_1/412/terms-and-definitions#commentsCurrent Revision posted to Revision Guide For Student Nurses - Part 1 by Arlo Guthrie on 2/27/2009 7:30:54 AM<br /> <p><strong>QUESTIONS</strong></p> <ol class="wikiextraspace"> <li>Define genetics. </li> <li>Name the scientist who discovered genes. </li> <li>State the First Law of Genetics. </li> <li>What is the exception to Mendel&#39;s First Law of Genetics? </li> <li>What is DNA? </li> <li>Describe the base pairs that form the structure of DNA molecules. </li> <li>What are chromosomes? </li> <li>What is the centromere? </li> <li>Why is it that chromosomes are only visible under the microscope when the cell is dividing? </li> <li>State the specific number of chromosomes in domestic dogs and cats. </li> <li>Describe the sex chromosomes. </li> <li>Since females possess 2 X chromosomes, it follows that they must therefore receive twice the number of genes carried on the X compared to males. In order to compensate for this, only one X chromosome in each cell of a female is activated and contains functional genes. The other X chromosome becomes contracted and contains predominantly inactivated and non-functional genes. This contracted X chromosome may be visible in the nucleus; what is it called? </li> <li>What are autosomes? </li> <li>What are homologous chromosomes? </li> <li>Where are genes located? </li> <li>What are alleles or allelomorphs? </li> <li>What are dominant genes? </li> <li>What are recessive genes? </li> <li>Give an example of co-dominant genes. </li> <li>What is meant by a phenotype? </li> <li>What is meant by a genotype? </li> <li>What is the difference between homozygous and heterozygous? </li> <li>What is meant by &quot;incomplete dominance&quot;? </li> <li>What are sex-linked genes? </li> <li>What are sex-limited genes? </li> <li>What is meant by &quot;lethal factors&quot;? </li> <li>What is meant by &quot;gene mutation&quot;? </li> <li>What is meant by &quot;epistasis&quot;? </li> </ol><div style="clear:both;"></div>