Content Outline for Teaching - Potosi School District - Home

20
Section 2
Content Outline
for Teaching
The Role of Genes
in Inheritance
Genetics—The Study of Inheritance
Underlined words and
phrases are to be filled
in by students on the
Note-taking Worksheet.
A. Heredity—passing traits from parents to offspring
B. Genetics—study of how traits are passed from parents to offspring through
small sections of DNA called genes
C. What determines traits?
1. A dominant allele will mask the other allele for a particular trait.
2. Recessive alleles show when two copies of the recessive allele are inherited.
D. Chance determines which traits an offspring will inherit from a parent.
E. Differences in organisms result from variations in the ways a trait appears.
1. Some traits result from multiple alleles and multiple genes.
2. A mutation can create new variations.
3. Selective breeding results in organisms with desired traits.
Discussion Question
What determines which traits an offspring will inherit from a parent? chance
The Role of Genes in Inheritance 67