Ke y c ontent of Activity 5

1. Heredity is the passage of genetic traits from one generation to the next.

2. Gregor Mendel (1822–1884) was a monk, teacher, and scientist, who studied the relationship between heredity and traits, mainly by experimenting with pea plants.

3. According to the laws of simple dominance, dominant traits will appear in the phenotype of an organism, while recessive traits are masked by the presence of a dominant trait.

4. Genes are sequences of DNA that encode for a particular trait.

5. Dominance is not always complete. Incomplete dominance refers to two traits that result in a third, intermediate trait, while co-dominance refers to the full expression of both traits in a heterozygote.

6. Some traits are determined by one gene, and others are determined by multiple genes.

Key content of Activity 6 1. In all organisms, genes carry the instructions for specifyingThe characteristics of the organism.

2. Cells contain two copies of each gene. These copies are called alleles.

3. Breeding generations of model organisms, such as corn, Provides extensive information aboutthe behavior of genes and the relationship between genotype and phenotype.