Ans224 Test 3-Final

Ans224 Test 3-Final - Test 3 Final Lecture 22 What are the...

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Test 3 – Final Lecture 22 What are the 5 developmental stages Neonatal stage – birth – 2 weeks Transitional stage – Weeks 2-3 Socialization period – Week 3-13 (3 months) Juvenile period – 13 weeks to sexual maturity Adult stage – sexual maturity onward Neonatal stage Nursing/sleeping, wt. gain 50% per week Poor temperature regulating ability Urination/defecation are reflexive Don’t walk until 5 days Rooting instinct – diminishes by 14 days Normal body temp 96-97 (for adults 100-102) Eyes/ear canals closed Transition Stage Eyes open on day 5 Pupilary light reflex – pupil becomes smaller to adjust to light Palperbral reflex – touch corner of eye, will close eye Eyes begin to open on the medial campus Development of homeothermic temperature – normal body temp begins Begin to walk back and forwardth Startle response begins to form Response to light and movement Socialization Period – 3 weeks – 3 months Become oriented to environment – become attached to others, learns place in back Operant and classic conditioning at adult levels Voluntary control of elimination Solid food can be eaten around day 25 Weaning 4-6 weeks up to 8 weeks Juvenile Period Avoidance begins – won’t socialize with new people/animals Starts barking more, Maximal learning at this time Lecture 25 – Gene of simple diseases How do mutations occur in the populations over many generations? Founder effect Popular sire or dam (usually this one or combination of two) What is the Founder effect? A diseases allele is concentrated in a small or new population (foundation population) at a higher relative frequency from the originating population. Frequency may have been 1/1000 but is now 1/10 Only 12 american chinchillas… What is popular sire or dam effect?
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Dog/cat fancy breeding often involves heavy use of popular sires of dams Concentrates desirable alleles in population If popular sire/dam carrying mutant allele, will increase that allele in the population. (will not see the mutant allele because they are recessive.) How do you determine how old a mutation is? If it is common – not a recent What is a disease in West Highland and Cairn terriers? Krabbe disease – lyzosomal storage disease – globoid cell leukodystrophy
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This test prep was uploaded on 04/06/2008 for the course ANSCI 224 taught by Professor Ellinwood during the Spring '07 term at Iowa State.

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Ans224 Test 3-Final - Test 3 Final Lecture 22 What are the...

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