Activity 4 Breeding Corn LIMITED LICENSE TO MODIFY

Activity 4 Breeding Corn

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Corn Reproductive Structures Activity 4: Breeding Corn

Introduction Read the introduction. � Sexual reproduction is reproduction in which two parents contribute genetic material to the offspring. � Selective breeding is the process by which organisms with desirable traits are mated with the goal of producing even more desirable offspring. Activity 4: Breeding Corn

Challenge � How can information about the genetic makeup of plants help farmers breed plants for desirable traits? Activity 4: Breeding Corn

Breeding Corn: First Generation Activity 4: Breeding Corn

Procedure Basic Genetics � An organism has two copies of the gene for each of its traits. These copies are called alleles. � A dominant trait will mask another version of a trait. A recessive trait will be hidden by a dominant trait. Activity 4: Breeding Corn

Procedure Creating a Punnett Square Activity 4: Breeding Corn

Which describes the cross that produced ear A? Ear B? Punnett Square XYY Activity 4: Breeding Corn Punnett Square YX Punnett Square Z

Procedure Breeding Corn: Second Generation Activity 4: Breeding Corn

Follow Up Analysis 1 � How does a Punnett square show the possible results of a cross between two individuals? Activity 4: Breeding Corn

Follow Up Analysis 3 � What do you predict will happen if a purple corn plant with the genes Pp is bred with a corn plant with purple kernels and the genes PP? Explain your answer, and include a matching Punnett Square. Activity 4: Breeding Corn

Follow Up Analysis 4 � How could scientists use selective breeding to help solve a sustainability challenge such as breeding a crop that can survive drought? Activity 4: Breeding Corn

Revisit the Challenge � How can information about the genetic makeup of plants help farmers breed plants for desirable traits? Activity 4: Breeding Corn

Key Vocabulary � allele � dominant � Punnett square � recessive � selective breeding � sexual reproduction � trait Activity 4: Breeding Corn