Term
| It takes a chicken ________ days to hatch, but development really takes _____ days (since some development occurs within the oviduct. |
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Definition
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Term
| How long does the sperm have to fertilize the ovulated ovum in the infundibulum? In other words, what is the timeframe for the fertilization window in chickens? |
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Definition
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Term
| When does cell division take place and in what area of the oviduct? |
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Definition
| starts about ~3 hours + after fertilization (in the Isthmus) |
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Term
| After the ovum has been fertilized it is now called a _________, which has all 78 chromosomes. |
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Definition
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Term
| how many chromosomes does a diploid chicken cell have? |
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Definition
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Term
| the three different embryonic tissue layers |
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Definition
-Ectoderm
-Endoderm
-Mesoderm |
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Term
| things that develop from the ectoderm |
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Definition
-Skin
-Feathers
-Beak
-Claws
-Eye (Lens, Retina)
-Nervous System
-Mouth, vent lining |
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Term
| things that develop from the endoderm |
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Definition
- Digestive System
- Respiratory System
- Endocrine System |
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Term
| things that develop from the mesoderm |
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Definition
- Muscles
- Bones
- Blood
- Repro System
- Excretory System |
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Term
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Definition
-Temperature below which embryo becomes dormant and most development stops
-Temperature above which embryo development activity starts |
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Term
| temperature at which chckens experience physiological zero |
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Definition
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Term
| What is the optimal temperature for development to occur during incubation? |
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Definition
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Term
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Definition
| Covers the yolk and produces an enzyme that converts yolk material into a food source |
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Term
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Definition
-The Amnion forms a sac that fills with fluid in which the embryo floats
-Provides a shock-absorbing environment |
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Term
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Definition
-a circulatory system (driven by the new embryo heart) infused membrane
-When fully developed the Allantois completely surrounds the embryo
-has respiratory, excretory, and digestive functions |
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Term
| what happens at day 3 of embryonic development? |
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Definition
| heart beats, blood vessels visible |
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Term
| what happens at day 12 of embryonic development? |
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Definition
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Term
| what happens at day 13 of embryonic development? |
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Definition
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Term
| what happens at day 14 of embryonic development? |
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Definition
| Emrbyo turns with head towards large end of egg |
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Term
| what happens at day 20 of embryonic development? |
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Definition
| Embryo is now breathing and punctured air cell |
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Term
| what happens at day 21 of embryonic development? |
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Definition
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Term
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Definition
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