Mendel and His Peas- 7th

Before Mendel’s work, how did people think heredity worked?

• People received traits from only one parent.

• Traits were unpredictably recessive or dominant.

• The traits of offspring were a mix of those of their parents.

• Traits turn themselves on and off from one generation to the next.

A true-breeding purple-flowered plant and a true-breeding white-flowered plant cross-pollinate. What color flowers will the offspring be?

• all purple

• half purple, half white

• 75% purple, 25% white

• 75% white, 25% purple

What is a genetic factor that blocks another genetic factor?

• genetic trait

• heredity trait

• recessive trait

• dominant trait

When Mendel cross-pollinated two second generation hybrid purple-flowered plants, what did the offspring look like?

• A) A few were white-flowered.

• B) Most were white-flowered.

• C) All were white-flowered.

• D) All were purple-flowered.

Tags

NGSS.MS-LS3-2

NGSS.MS-LS4-4

Mendel concluded that how many factors control each inherited trait?

• 1

• 2

• 3

• 4

What is taking place in the figure?

• self-pollination

• cross-pollination

• a hybrid cross

• a second-generation cross

What is shown in the figure?

• True-breeding self-pollination

• A first-generation cross

• A second-generation cross

• A third-generation cross

What is shown in the figure?

• True-breeding self-pollination

• A first-generation cross

• A second-generation cross

• A third-generation cross

Tags

NGSS.MS-LS3-2

What is heredity?

• The study of DNA

• The process of chromosomes mutating

• The study of how traits are passed from parents to offspring

• the passing of traits from parents to offspring

Tags

NGSS.MS-LS3-2

How do dominant and recessive factors interact in inheritance?

• Both factors are always expressed equally

• Recessive factors are stronger than dominant ones

• The dominant factor masks the recessive one when both are present

• The factors blend together to form a new trait