The anatomy of the pharynx and esophagus and their complementary activities in the process of swallowing. Concept introduction: The digestive system consists of a collection of organs that help in the digestion of food materials and converting them into basic energy-rich molecules for supplying them to the entire body. The ingested complex nutrients are broken down into simpler molecules and are absorbed into the blood along with the electrolytes and water.

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Definition Definition Organ system that helps in the digestion of food by mechanical and biochemical processes. The digestive system breaks down food into simpler components that enable the body to then absorb or transport nutrients. The human digestive system includes the gastrointestinal tract or alimentary canal and the associate glands. The organs of the gastrointestinal tract include the mouth, pharynx, esophagus, stomach, small intestine, and large intestine. The associated glands include salivary glands, liver, gallbladder, and pancreas.

Chapter 26.2, Problem 18LO

Summary Introduction

To discuss: The anatomy of the pharynx and esophagus and their complementary activities in the process of swallowing.

Concept introduction: The digestive system consists of a collection of organs that help in the digestion of food materials and converting them into basic energy-rich molecules for supplying them to the entire body. The ingested complex nutrients are broken down into simpler molecules and are absorbed into the blood along with the electrolytes and water.

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Question #3: In the KeyGene paper, the authors state that it would be useful if pollen from an apomict would transmit apomixis-inducing genes to the female in the cross (assuming the pollen is viable). Assuming there was just one gene conferring gametophytic obligate apomixis, and that the two parents are inbreds, what would be the consequences of such a cross if: a) The apomixis was a dominant trait? Indicate the genotypes and phenotypes (apomict or non- apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female first (left side) in the parental cross. b) The apomixis was a recessive trait? Indicate the genotypes and phenotypes (apomict or non- apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female first (left side) in the…

Question #5: Assume that two genes are identified that confer gametophytic facultative apomixis in soybean. The genes show independent assortment. Recessive alleles at both loci are required for the facultative apomixis. Facultative apomixis is triggered when the temperature at pollination is above 20 degrees C. At temperatures below 20 degrees C, all reproduction is sexual, independent of genotype. A facultative apomict male, capable of producing viable pollen, was crossed with a sexually reproducing female. Assuming the parents are completely inbred, what are the predicted phenotypic ratios (apomict: non-apomict) for the F1, F2, and DH (F1-derived) generations at each of the following temperatures*: a) 15°C? b) 25°C? *for full credit, show crosses and genotypes where appropriate. Remember to position the female first (left side) in the cross. Type your answer here:

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Definition Definition Organ system that helps in the digestion of food by mechanical and biochemical processes. The digestive system breaks down food into simpler components that enable the body to then absorb or transport nutrients. The human digestive system includes the gastrointestinal tract or alimentary canal and the associate glands. The organs of the gastrointestinal tract include the mouth, pharynx, esophagus, stomach, small intestine, and large intestine. The associated glands include salivary glands, liver, gallbladder, and pancreas.

Chapter 26.2, Problem 18LO

Summary Introduction

To discuss: The anatomy of the pharynx and esophagus and their complementary activities in the process of swallowing.

Concept introduction: The digestive system consists of a collection of organs that help in the digestion of food materials and converting them into basic energy-rich molecules for supplying them to the entire body. The ingested complex nutrients are broken down into simpler molecules and are absorbed into the blood along with the electrolytes and water.

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Answer 3

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Definition Definition Organ system that helps in the digestion of food by mechanical and biochemical processes. The digestive system breaks down food into simpler components that enable the body to then absorb or transport nutrients. The human digestive system includes the gastrointestinal tract or alimentary canal and the associate glands. The organs of the gastrointestinal tract include the mouth, pharynx, esophagus, stomach, small intestine, and large intestine. The associated glands include salivary glands, liver, gallbladder, and pancreas.

Chapter 26.2, Problem 18LO

Summary Introduction

To discuss: The anatomy of the pharynx and esophagus and their complementary activities in the process of swallowing.

Concept introduction: The digestive system consists of a collection of organs that help in the digestion of food materials and converting them into basic energy-rich molecules for supplying them to the entire body. The ingested complex nutrients are broken down into simpler molecules and are absorbed into the blood along with the electrolytes and water.

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Answer 4

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Definition Definition Organ system that helps in the digestion of food by mechanical and biochemical processes. The digestive system breaks down food into simpler components that enable the body to then absorb or transport nutrients. The human digestive system includes the gastrointestinal tract or alimentary canal and the associate glands. The organs of the gastrointestinal tract include the mouth, pharynx, esophagus, stomach, small intestine, and large intestine. The associated glands include salivary glands, liver, gallbladder, and pancreas.

Chapter 26.2, Problem 18LO

Summary Introduction