Biology 1201A Chapter 10: Mendel, Genes, and Inheritance

• School: Western University
• Department: Biology
• Course: Biology 1201A
• Professor: Vera Tai

Document Summary

10 mendel, genes, and inheritance (cid:1005)(cid:1004). (cid:1005) the begi(cid:374)(cid:374)i(cid:374)g of ge(cid:374)eti(cid:272)s: me(cid:374)del"s pea ga(cid:396)de(cid:374) Until 1900, scientist s believes in the blending theory of inheritance- suggested hereditary traits blend evenly i(cid:374) offsp(cid:396)i(cid:374)g th(cid:396)ough the (cid:373)i(cid:454)i(cid:374)g of pa(cid:396)e(cid:374)ts" (cid:271)lood, (cid:373)u(cid:272)h like the (cid:373)i(cid:454)i(cid:374)g effe(cid:272)t of (cid:272)offee a(cid:374)d (cid:272)(cid:396)ea(cid:373) G(cid:396)ego(cid:396) me(cid:374)del e(cid:454)pe(cid:396)i(cid:373)e(cid:374)ted (cid:449)ith pea pla(cid:374)ts i(cid:374) the (cid:1005)(cid:1012)6(cid:1004)"s- he studied a variety of heritable characteristics called characters, such as flour colour and seed shape. A variation in a character, such as purple or white flower colour, is called a trait. Mendel established that characters are passed to offspring in the form of discrete hereditary factors, which are now known as genes. 10. 1a mendel chose true-breeding garden peas for his experiments. Normally, pea plants self-fertilize (self-pollinate)- but or his experiment, mendel prevented self-fertilization by cutting off the antlers. This meant that the pollen needed to fertilize the flowers had to come from a different plant- this technique is called cross-pollination.