Mendelian Genetics

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" colspan=2 height=90 BGCOLOR="#006699" TEXT="#080000" bgproperties="fixed" background="02c285a1erlcgo.png"> <div> <FONT SIZE="5" COLOR="#FFCC66" FACE="Arial" ><B>Mr. Manning's Life Science Class</B></FONT><B>     |     </B><A HREF="index.htm" TARGET="_top" TITLE="Mr. Mannings Life Science Class"><B>home</B></A></div> <div>                                                   </div> <div> </div> </td> </tr><tr> <td valign="top" width=210 BGCOLOR="#FFCC66" TEXT="#080000" background="02ad2c00dkelyh.png"> <div> Return to</div> <div> <A HREF="index_mr__manning_s_life_science_class_website.htm" TARGET="_top" TITLE="Mr. Mannings Life Science Class">Mr. Manning's Life Science Class website</A></div> </td> <td valign="top" height=390 width="100%" BGCOLOR="#FFFFFF" TEXT="#080000"> <div> <I> <A NAME="mendelian_genetics"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="1" ALIGN="bottom" WIDTH="1" HSPACE="0" VSPACE="0" ></A></I><I>Mendelian Genetics</I></div> <div> <IMG SRC="9528cc30.jpg" border=0 width="140" height="195" ALIGN="BOTTOM" HSPACE="0" VSPACE="0">     <IMG SRC="95498b70.jpg" border=0 width="152" height="183" ALIGN="BOTTOM" HSPACE="0" VSPACE="0">   <IMG SRC="95686b90.jpg" border=0 width="134" height="185" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div>             1862                                  1868                            1880</div> <bR> <div> Genetic Terminology:</div> <bR> <div>     * Trait - any characteristic that can be passed from parent to offspring</div> <div>     * Heredity - passing of traits from parent to offspring</div> <div>     * Genetics - study of heredity</div> <div>     * Alleles - two forms of a gene (dominant & recessive)</div> <div>     * Dominant - stronger of two genes expressed in the hybrid; represented by a capital letter (R)</div> <div>     * Recessive - gene that shows up less often in a cross; represented by a lowercase letter (r)</div> <div>     * Genotype - gene combination for a trait (e.g. RR, Rr, rr)</div> <div>     * Phenotype - the physical feature resulting from a genotype (e.g. tall, short)</div> <div>     * Homozygous genotype - gene combination involving 2 dominant or 2 recessive genes (e.g. RR or Rr); also called pure </div> <div>     * Heterozygous genotype - gene combination of one dominant & one recessive allele    (e.g. Rr); also called hybrid</div> <div>     * Monohybrid cross - cross involving a single trait</div> <div>     * Dihybrid cross - cross involving two traits</div> <div>     * Punnett Square - used to solve genetics problems</div> <bR> </td> </tr></table></body>