Genetic Traits and Alleles in Living Organisms

The video introduces traits as characteristics passed from one generation to another, such as hair color and height. It explains that traits can have different forms, known as alleles, and can be dominant or recessive. Dominant traits require only one dominant allele to be expressed, while recessive traits need two recessive alleles. The video concludes with a summary of how traits are inherited genetically.

What are traits?

• A type of animal

• A type of plant

• Characteristics that can be passed from one generation to another

• A form of energy

Which of the following is an example of a trait?

• The size of a building

• The height of a person

• The color of a car

• The speed of a computer

What are alleles?

• Different forms of the same trait

• A type of food

• A kind of music

• A species of bird

How is a dominant trait expressed?

• If at least one copy of the gene is present

• Only in the absence of any gene

• Only in the presence of a recessive gene

• Only if two copies of the gene are present

When will a recessive trait be expressed?

• When one recessive allele is present

• When no alleles are present

• When two recessive alleles are present

• When one dominant allele is present