BSC 108 Lecture Notes - Lecture 16: Zygosity, Phenotype, Amniocentesis

• School: University of Alabama
• Department: Biological Sciences
• Course: BSC 108
• Professor: Christine J.Yates

Document Summary

Genetic testing: allows expectant parents to test for possibilities in their unborn child. Inheritable variation and patterns of inheritance: gregory mendel. The first person to analysis patterns of inheritance. He created true-breeding varieties of plants: mendel then crossed two different true breeding varieties creating hybrids, the offspring form these rosses are called the first filial of f1 generation. A cross between parent plants that different in only one. Four hypotheses characteristic: there are alternative forms of genes. The units that determine heritable traits: for each inherited character, an organism inherits two alleles. If the gene is there then it will be expressed: recessive. Homozygous: when an organism has identical (same) alleles for a gene. Heterozygous: when an organism has different alleles for a gene. Phenotype: the physical traits we see. Genotype: an organism genetic makeup, there should be two copies (alleles) for each gene.