LIFESCI 4 Chapter Notes - Chapter 14.1 - 1.4.4: Gamete, Punnett Square, Mendelian Inheritance
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14. 1: mendel used the scientific approach to identify two laws of inheritance. The first few paragraphs on pg 252 have worthless information about mendel"s history so if you"re really interested you could look at that. Reproductive organs in a pea plant are in flowers each flower has stamens and carpels. Mendel was able to cross-pollinate by removing stamens before they produced pollen and brushed the pollen onto carpels of another plant. Mendel used true-breeding plants, which are plants that always produce the same variety of characteristics when self-pollinating: ex) purple flowers that self-pollinate itself will always get purple flowers. Law of independent assortment a monohybrid is a parent that was heterozygous for one character: a cross between monohybrids are called a monohybrid cross. Because mendel found out that shape and color are independent of each other, he concluded with the law of independent assortment. a dihybrid is heterozygous for both characters (ex: yyrr)
