Warm-Up Questions3/11

1. What is selective breeding?

2. What is an example of organisms that have been selectively bred?

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Cool-down Questions 3/11

Excessive inbreeding among cheetahs has resulted in a higher death rate among the cheetah population. WHY IS THIS TRUE?

a. Inbreeding decreases genetic variation

b. Inbreeding produces the worst traitsc. Inbreeding increases genetic

variationd. Inbreeding produces more organisms

than other breeding methods

Warm-Up Questions3/12

The domestic dog was developed through inbreeding from wolves. How might this process occur?a. People changed the genetic material in wolvesb. People eliminated aggressive wolves through

huntingc. People bred wolves with animals from similar

speciesd. People bred wolves with mild tempers over

many generations

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Cool-down Questions 3/12

Use pages 88 – 89 in coach book to answer the following question

What is the difference between hybridization and inbreeding?

Mule

Warm-Up Questions3/13

Substitute today: Write warm-up question on board.

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Warm-Up Questions3/14

A scientist crossed a tall pea plant with a short pea plant. Out of the offspring, 39 plants were tall and 13 were short. 1. What is the phenotypic ratio?

a. 4:0b. 2:2c. 3:1

2. What percentage describes the short plants?a. 100% b. 75% c. 25% d. 50%

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Warm-Up Questions3/15

1. Some genetic disorders, such as sickle cell anemia or Tay Sachs, are due toa. a ribosome. c. a DNA fingerprint.b. a mutation. d. genetic engineering.

2. When a dairy farmer chooses a specific bull to mate with her cows in order to produce calves that will grow up to produce more milk, this process is called a. genetic typing c. genetic counseling

b. selective breeding d. regeneration

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