ANT335Y1 Lecture 2: BIO120 Final Exam Notes
Document Summary
Phenotype: [observable characteristics of an organism - the visible expression of its genetic make- up. ] is a description of the appearance of the organism. Any characteristic can have several phenotypes, e. g. a daffodil can have yellow flower color or orange flower color or white flower color. If two individuals with the same phenotype are crossed through several generations and the offspring always have the same phenotype, then they are called true breeding. The dominant characteristic will cover up, or mask, the recessive one, although the genetic information for the recessive characteristic is still present. When we are describing crosses the original generation in a cross are called p [for parental], and the offspring of the p generation are called the f1 generation. The result of crosses between the f1 generation are called the f2 generation. When two true breeding organisms are crossed the f1 are all the same.
