Variation And Inheritance

• Variation is the differences in the characteristics of individuals in a population.
• Phenotype is the physical expression of a gene.
• F1 is the symbol used for the first generation is a genetic cross.
• Homozygous is when an individual has two identical alleles for a particular gene.
• Heterozygous is a genotype that has two different alleles for a particular gene.
• Genotype is the term used to describe the genetic makeup of an organism.
• Recessive genes are genes that are masked by the dominant allele.
• F2 is the symbol used for the second generation of a genetic cross.
• P is the symbol used for the Parents in a genetic cross
• Polygenic is when a trait is controlled by multiple genes.
• Alleles are different versions of the same gene.
• The dominant gene is the one that is expressed in the majority of cells in the organism.
• Discrete Variation is when there are discrete values for a trait, such as height or weight.
• Continuous Variation is when the variation is continuous and can be measured on a scale.