BIOLOGY 2C03 Chapter Notes - Chapter 2: Gregor Mendel, Franz Unger, Pisum
21 Oct 2017
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2. 1 - gregor mendel discovered the basic principles of genetic transmission. Interpret experimental results, comparing the observed results to those expected under assumptions of the hypothesis: draw reasonable conclusions, reformulating or retesting the hypothesis if necessary. Five critical experimental innovations: controlled crosses between plants, pea plants contain a pollen-producing anther and an egg-containing ovule, they usually self-fertilize, occurs when sperm-containing pollen from the anther fertilizes an egg within the ovule. 2. 2 - monohybrid crosses reveal the segregation of alleles. If self-fertilized, or two pure-breeding organisms for the same trait are crossed, the progeny receive identical alleles from each parent and have the same homozygous genotype as their parents: heterozygous genotype, two different alleles make up the genotype. F2 generation: 3:1 phenotypic ratio, dominant to recessive, 1:2:1 genotypic ratio, hh, hh, hh. Allele segregation: gametes, separated alleles of reproducing organisms, the punnett square shows the genotypic results of random gamete combinations, mendel"s first law: law of segregation.
