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ANSC Genetics > EBV PART 2 > Flashcards

EBV PART 2 Flashcards

1
Q

Why measure traits x to measure a breeding value for trait y

A

Cheaper and faster and early in life for the other one

If the heritability you measure is higher than the breeding value

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2
Q

Why would traits be genetically correlated, 2 reason

A

Linkage

Pleiotropy

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3
Q

genes are inherited together

A

Linkage

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4
Q

same genes affect multiple traits

A

Pleiotropy

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5
Q

NOT cause and effect

A

Linkage

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6
Q

linked to economic trait

A

Marker gene

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7
Q

What is BLUP

A

Best Linear Unbiased Prediction

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8
Q

allows us to consider all animals in the dataset simultaneously

A

Animal models

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9
Q

What is the result of using BLUP and Animal Model

A

Estimate genetic and environmental trends over time

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10
Q

Progeny in more than one herd

A

Use of Reference Sires

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11
Q

T or F - EBVs for all animals can be directly compared

A

True

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12
Q

Group of animal that push breeding value to 0

A

Genetic Base

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13
Q

What are the types of genetic base

A

Moving base

Fixed Base

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14
Q

the base changes with each analysis

A

Moving base

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15
Q

a set point that doesn’t change

A

Fixed Base

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16
Q

What are the three main types of EPD used in evaluation

A

PARENT EPD
NON PARENT EPD
PEDIGREE EPD

17
Q

sires and dams (they have progeny with data)

A

Parent EPD

18
Q

Has own record, no progeny

A

Non parent EPD

19
Q

no record itself; average of parent EPDs

A

Pedigree EPD

20
Q

Possible Change to the accuracy depends on the variance of the trait’s what

A

Confidence Range

Standard Error of the EPD

21
Q

Consequence of being wrong

A

Risk

22
Q

How do you absorb risk

A

Use of large herds can absorb risk better

23
Q

Common questions about genetic evaluations

A
  • What does +15 lbs mean?
  • Why do EPDs change?
  • What is the average EPD?
  • How high an accuracy do I need?

ANSC Genetics (5 decks)

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