Egg Incubation Processes and Characteristics

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Questions and Answers

What happens to the permeability of the cuticula during incubation?

It increases due to high temperature. (correct)

It increases due to decreased temperature.

It decreases, causing less gas exchange.

It remains constant throughout incubation.

Where is the air chamber located in relation to the shell membranes?

At the pointed end of the egg.

Outside the shell membranes.

Between the two shell membranes. (correct)

At the center of the egg.

What is the total thickness range of an egg shell?

0.5 mm to 0.7 mm

0.1 mm to 0.3 mm

0.25 mm to 0.45 mm (correct)

0.4 mm to 0.6 mm

How much water can evaporate from the egg during the incubation process?

15% (D) Signup and view all the answers

Which statement about the egg white's chemical composition is correct?

It is largely composed of water. (C) Signup and view all the answers

What effect does a dry and warm environment have on the air chamber of the egg?

It increases the size of the air chamber. (D) Signup and view all the answers

How do the membranes of the egg shell relate to the egg's contents?

They lie close together and aid in gas exchange. (A) Signup and view all the answers

What occurs on average 30 minutes after an egg is laid?

The ovulation of a new egg cell occurs. (C) Signup and view all the answers

What is the impact of laying an egg late in the light phase?

Ovulation of the next egg cell is delayed to 16 to 18 hours later. (B) Signup and view all the answers

What characterizes a laying series in hens?

It represents the total number of eggs laid before a one-day stop. (A) Signup and view all the answers

Which hormone concentrations are presumed to be higher in good layers?

Follicle-stimulating hormone (FSH) and luteinizing hormone (LH). (D) Signup and view all the answers

What is the average size of the laying series for laying chickens?

10 - 14 eggs. (D) Signup and view all the answers

What is primarily responsible for the size of the egg in chickens during its passage through the oviduct?

The size of the egg cell (A) Signup and view all the answers

Which of the following abnormalities can occur due to faults in the egg formation system?

Multiple yolk eggs (A), Soft-shelled eggs (D) Signup and view all the answers

What role do hormones from the ovarium play in the chicken reproductive system?

They stimulate the oviduct and influence secondary sexual characteristics. (C) Signup and view all the answers

In chickens, what is the consequence of smaller egg cells at the beginning of the laying period?

They result in lighter eggs due to less egg white allocation. (C) Signup and view all the answers

What effect does estrogen have on female chickens?

It ensures the female plumage and sexual behavior. (C) Signup and view all the answers

What is indicated by the open block with 'ovulation' in the provided comparison of LH-release?

The time of ovulation for the first egg in a laying series. (A) Signup and view all the answers

Which statement about the oviduct in chickens is correct?

It is stimulated by both female and male hormones. (A) Signup and view all the answers

What could potentially cause the formation of wind eggs in chickens?

Overstressed hens (A) Signup and view all the answers

How is egg white formed during the egg's passage through the oviduct?

It is produced by the oviduct walls. (A) Signup and view all the answers

What is the significance of the absence of a corpus luteum in chickens compared to mammals?

It eliminates the need for progesterone. (C) Signup and view all the answers

Which hormone is believed to play a major role in the muscle contractions during egg laying?

Oxytocin (B) Signup and view all the answers

How do light conditions influence the reproductive cycle of chickens?

Longer days trigger hormonal changes for egg laying. (C) Signup and view all the answers

How does the egg pass through the hen's body during oviposition?

Muscle contractions assist in the movement. (A) Signup and view all the answers

What happens to the seasonal pattern of egg laying in domesticated laying hens?

It is completely eliminated due to controlled lighting. (D) Signup and view all the answers

What role does the cloaca play during the egg-laying process in chickens?

It enables the egg to be laid without contact. (D) Signup and view all the answers

What characterizes the egg-laying process in chickens compared to mammals?

It resembles mammalian parturition closely. (B) Signup and view all the answers

What influence does ultraviolet light have on certain bird species with respect to egg-laying?

It has no significant effect on reproduction. (B) Signup and view all the answers

What is primarily responsible for the communication of seasonal information to the hypothalamus in chickens?

Visual perception of light length (D) Signup and view all the answers

What movement occurs to the egg once it is fully formed before laying?

It rotates 180 degrees. (A) Signup and view all the answers

What primarily determines the shape of an egg?

Genetic factors specific to each hen (A) Signup and view all the answers

What does the Haugh unit indicate about an egg?

The freshness of the egg (D) Signup and view all the answers

What is the ideal shape index range for eggs to fit into usual packaging?

72-76 (C) Signup and view all the answers

Which factor is NOT associated with a decline in shell thickness?

Excessive cold temperatures (A) Signup and view all the answers

What is a common abnormality in the structure of eggshells?

Extreme roughness or excessive pore presence (B) Signup and view all the answers

Which breed of chicken is known for laying blue eggs?

Araucana (C) Signup and view all the answers

How does the shape of eggs affect their ability to withstand pressure?

Curved shapes withstand high static pressure effectively (B) Signup and view all the answers

What characterizes the shell color of chicken eggs?

Pigment in the shell mainly determines color (D) Signup and view all the answers

What can lead to increased moisture loss in eggs?

Pores and hairline cracks in the shell (A) Signup and view all the answers

Signup and view all the answers

Study Notes

Biology of Domestic Animals YAS-10806 Reader Contents

Cases: Each case has self-study material and a practical manual. Some manuals are available on Brightspace.
- Case 1: Egg (p. 1, p. 24) - Chicken
  - Study objectives: Composition, formation, hormone regulation, quality characteristics, laying cycle, laying series, laying curves, and sensory analysis
- Case 2A: Sperm (p. 36) - (No animal species specified)
- Case 2B: Meat (p. 47, p. 85)
  - Study objectives: Meat consumption, production (Netherlands and worldwide), slaughtering processes, meat structure and composition (muscle tissue) by animal species, meat components by location on the animal, and influences on growth and body composition.
- Case 3: Nutrition (p. 46) - General (No animal species specified)
- Case 4: Milk products - (No details in this table)
- Case 5: Fish (p. 129) - (No animal species specified)
- Case 6: Horse (p. 167, p. 187)
  - Study objectives: Changes in horse evolution and anatomy compared to humans, leg function, gaits, horse-human cooperation.
- Case 7: Dog (p. 199, p. 212)
  - Study objectives: Basic senses (hearing, seeing, smelling), comparative biology of senses.
- Case 9: Immunology -(No details in this table)
- Case 10: DNA (p. 297, p. 320) - Sheep
  - Study objectives: Animal breeding, genetic conservation, genetic improvement, comparative biology using genes and genomic databases.

Case 1: Egg

Animal species: Chicken
Study objectives: To understand the composition, formation, hormone regulation, laying cycle, laying series, laying curves, and sensory analysis of chicken eggs.

Case 2B: Meat

Study objectives: Gain an understanding of meat consumption and production globally, the slaughtering process, and the structure and composition of meat (muscle tissue) in various animals. Includes recognizing genetic differences in meat growth across animal species and understanding factors influencing growth/body composition.

Case 6: Horse

Study objectives: Understand the key functional changes in horses during evolution and domestication. Compare horse anatomy with humans, and understand adaptations for horse legs, gaits (e.g., walk, trot, canter), and unique adaptations of horses for human cooperation.

Case 7: Dog

Study objectives: Focus on understanding basic concepts of the senses in dogs, particularly hearing, seeing, and smelling, as well as comparative biology of the senses across species, including dogs and humans.

Case 10: DNA

Study objectives: Knowledge of animal breeding terms, genetic conservation techniques, and genetic improvement. Study and apply comparative biology of genes and genomic databases.

Practical Manuals

Practical manuals are available online on Brightspace, and provide instructions and guidance for performing experiments and tasks related to the various cases.

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Description

This quiz explores various aspects of egg incubation, including the permeability of the cuticula, the location of the air chamber, and the chemical composition of egg white. Participants will test their knowledge on the effects of environmental conditions on egg structures and the physiological aspects related to laying hens.