11. Oogenesis

Question 1

Growing follicles (transfer of yolk materials from plasma to ovarian follicle)

Answer 1

Oogenesis

Question 2

major source of yolk protein and
phospholipids

Answer 2

Liver

Question 3

Maximum # of mature eggs laid by a hen

Answer 3

1,500 eggs

Question 4

Undergo full development
(a lot undergo ovulation)

Answer 4

ovarian follicles (4-10 mm)

Question 5

Degenerates & become atretic

Answer 5

ovarian follicles (<4 mm)

Question 6

increase of abdominal contraction causes this

Answer 6

Bearing Down Reflex / OVIPOSITION

Question 7

FACTORS AFFECTING OVIPOSITION

Answer 7

1. Number of eggs laid in a given time
2. Sequence in which eggs are laid
3. Intervals in sequence of egg
4. Lighting (controlled in layer farms to maximize egg laying)

Question 8

Loosing of feathers which occurs once a year for 4-6 weeks if exposed to natural lighting.

Afterwards, birds would start laying eggs again.

• Can be artificially induced by stress

Answer 8

MOLTING

Question 9

CHARACTERISTICS OF MOLTING CHICKEN:

Answer 9

1. Inhibition of ovulation
2. Inhibition of oviposition
3. Regression of reproductive tract
4. Decreased blood levels of reproductive hormones (LH, progesterone)

Question 10

AVIAN PARENTAL BEHAVIOR

Answer 10

1. Nest building
2. Incubation of eggs
3. Brooding new hatchlings
4. Taking care of the young
5. Protection from predators

Question 11

used to bypass insulation (feathers) of parent to promote induction of heat from body to eggs

Simply, intentional losing of feathers to conduct body heat to eggs

Answer 11

brooding patch

Question 12

Begin incubation with last egg laid and eggs hatch synchronously

Answer 12

synchronous hatching