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Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
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magnussd magnussd
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8 years ago
1.   A rancher runs a closed herd of breeding cattle. He normally keeps and breeds the top 3% of his bull calves based on individual performance for yearling weight (YW). His sires average three years of age when their offspring are born. He is studying two female replacement strategies:
(Hint: Use the selection intensity chart in your book or slides)
•   Saving the top 20% of his heifers based on YW (Lf = 6.2 years)
•   Saving the top 60% based on YW (Lf = 3.2years)
a.   If h2YW = 0.5, and σPYW = 60 lb, calculate the expected rate of genetic change in yearling weight for each strategy. (2 pts)



b.   What elements of the key equation is the rancher experimenting with? (1pt)


c.   What element appears to be more important? (1pt)
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#1
8 years ago
I seem to have found your question in this booklet. See if it helps Nerd Face
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magnussd Author
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#2
8 years ago
what page?
wrote...
#3
Educator
8 years ago
33
magnussd Author
wrote...
#4
8 years ago
I have checked over and over again. I need it put here now cause I've reached my download limit.
wrote...
#5
Donated
Trusted Member
8 years ago
if you downloaded the file once chances are its still on your computer in the download folder
magnussd Author
wrote...
#6
8 years ago Edited: 8 years ago, magnussd
alright found the table but that doesn't help me with the math

Post Merge: 8 years ago

Not helpful. In fact the table that you show isn't even close to what is needed. Very frustrated to need help on a formula but now one seems to be able to help. Look I need help otherwise I wouldn't be here.
wrote...
#7
Educator
7 years ago
Quote from: magnussd (8 years ago)
Not helpful. In fact the table that you show isn't even close to what is needed. Very frustrated to need help on a formula but now one seems to be able to help. Look I need help otherwise I wouldn't be here.

Could you update us on what you did / answered?
wrote...
#8
2 years ago
Thank you Slight Smile
wrote...
#9
2 years ago
thank you
Anonymous
wrote...
#10
7 months ago
Try this for an answer
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