Lesson 2: Understanding Inheritance

What controls traits?

Inside each cell is a nucleus that contains threadlike structures called _______.

Mendel's factors are parts of chromosomes, and each cell in offspring contains chromosomes from both _______.

A(n) _______ is a section on a chromosome that has genetic information for one trait.

The different forms of a gene are called _______.

Geneticists refer to how a trait appears, or is expressed, as the trait’s _______.

The two alleles that control the phenotype of a trait are called the trait’s _______.

In genetics, uppercase letters represent dominant alleles, and lowercase letters represent recessive alleles. True or False?

When two alleles of a gene are the same, its genotype is _______.

If two alleles of a gene are different, its genotype is _______.