BIOL 111 Lecture Notes - Lecture 22: Gynoecium, Heredity, Reciprocal Cross

• School: Texas A&M University
• Department: Biology
• Course: BIOL 111
• Professor: Tag Andrew

Document Summary

Chapter 14 mendel and the gene idea: One possible explanation of heredity is a (cid:862)(cid:271)le(cid:374)di(cid:374)g(cid:863) h(cid:455)pothesis: the idea that genetic material contributed by two parents mixes in a manner analogous to the way blue and yellow paints blend to make green. A(cid:374) alte(cid:396)(cid:374)ati(cid:448)e to the (cid:271)le(cid:374)di(cid:374)g (cid:373)odel is the (cid:862)pa(cid:396)ti(cid:272)ulate(cid:863) h(cid:455)pothesis of i(cid:374)he(cid:396)ita(cid:374)(cid:272)e: the gene idea: parents pass on discrete heritable units, genes. Documented a particulate mechanism of inheritance through his experiments with garden peas. Mendel used the scientific approach to identify two laws of inheritance. Mendel discovered the basic principles of heredity: by breeding garden peas in carefully planned experiments. Mendel chose to work with peas: because they are available in many varieties, because he could strictly control which plants mated with which. Application: by crossing (mating) two true-breeding varieties of an organism, scientists can study patterns of inheritance; mendel crossed pea plants of varied flower color.