Heredity: Dominant and Recessive Traits

The video tutorial explains Mendel's principles of dominance and recessiveness, where dominant traits mask recessive ones. It uses letters to symbolize these traits, with capital letters for dominant and lowercase for recessive. The tutorial illustrates this with examples of pea plant traits, such as height and peapod color. It describes how crossing true-breeding plants results in offspring with predictable traits, demonstrating Mendel's laws of inheritance.

What is the principle that explains why a dominant trait masks a recessive trait?

• Law of Segregation

• Law of Inheritance

• Law of Dominance

• Law of Independent Assortment

How are dominant and recessive traits symbolized in Mendel's studies?

• Dominant: lowercase letter, Recessive: capital letter

• Dominant: capital letter, Recessive: lowercase letter

• Both are symbolized by capital letters

• Both are symbolized by lowercase letters

What is the symbol for a true-breeding tall pea plant?

• Lowercase t, lowercase t

• Capital T, lowercase t

• Capital T, capital T

• Lowercase t, capital T

In Mendel's study, what color are the pea pods of the first generation offspring when a green and a yellow pea plant are crossed?

• Both green and yellow

• Green

• Yellow

• Neither green nor yellow

If two first-generation green pea plants are cross-pollinated, what fraction of the offspring will have yellow pea pods?

• Three out of four

• Two out of four

• One out of four

• All four