Corn Breeding / Genetic Problem A corn breeder is working with 2 inbred corn plants. He is interested in two traits: High yield (produces lots of corn) and drought tolerance (does not need lots of water). High yield (H) is dominant to low yields (h). Drought tolerance (D) is dominant to drought intolerance (d). Inbred 1 is true breeding for drought tolerance and low yield (DDhh). Inbred 2 is true breeding for drought intolerance and high yield (ddHH). In the parent cross (P) the corn breeder crossed inbred 1 with inbred 2. The resulting F₁hybrid (DdHh) was heterozygous for drought tolerance and high yields. Phenotypically all the corn needs little water to grow and produces lots of corn. This is the corn that is sold to farmers, planted in the Spring and arvested in the Fall. Explain why the farmer does NOT hold back some of the Fall harvested (F₂) kernels and plant them next Spring. You must show your work. (Hint: As a %, how many of the F2 kernels still carry the drought tolerant and high yield alleles?)

Corn Breeding / Genetic Problem A corn breeder is working with 2 inbred corn plants. He is interested in two traits: High yield (produces lots of corn) and drought tolerance (does not need lots of water). High yield (H) is dominant to low yields (h). Drought tolerance (D) is dominant to drought intolerance (d). Inbred 1 is true breeding for drought tolerance and low yield (DDhh). Inbred 2 is true breeding for drought intolerance and high yield (ddHH). In the parent cross (P) the corn breeder crossed inbred 1 with inbred 2. The resulting F₁hybrid (DdHh) was heterozygous for drought tolerance and high yields. Phenotypically all the corn needs little water to grow and produces lots of corn. This is the corn that is sold to farmers, planted in the Spring and arvested in the Fall. Explain why the farmer does NOT hold back some of the Fall harvested (F₂) kernels and plant them next Spring. You must show your work. (Hint: As a %, how many of the F2 kernels still carry the drought tolerant and high yield alleles?)

Name: elpNormal▾BIU A -Corn Breeding / Genetic ProblemA corn breeder is wor
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Description: elpNormal▾BIU A -Corn Breeding / Genetic ProblemA corn breeder is working with 2 inbred corn plants. He is interested in two traits: High yield (produceslots of corn) and drought tolerance (does not need lots of water). High yield (H) is dominant to

An Illustrated Guide To Vet Med Term

4th Edition

ISBN:9781305465763

Author:ROMICH

Publisher:ROMICH

Chapter20: Make Room For The Ruminants

Section: Chapter Questions

Problem 18MC

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A flock of sheep have 140% lambing. The goal is increased fleece weight with smaller fiberdiameter. There are 960 ewes mated at a ratio of 1:40. Rams are two years old when their firstoffspring are born. After the 1st breeding season, ¾ of the rams are kept and used in a secondseason with those sold replaced with new, younger rams. Ewes first lamb at 2 years of age andare retained for 6 lambings but 10% of ewes fall out each year because of non-pregnancy and/ordeath loss (equal loss from all age groups). Fleece weight heritability is 0.3 and phenotypic sd 1lb.A. Calculate the direct response to selection on fleece weight.B. Fleece weight measures the quantity of fiber produced by an animal; however fleeceweight is related to fiber diameter with a genetic correlation of .35. Fiber diameter hasa phenotypic sd of 1.5 micron and heritability 0.5.C. Calculate the response in fiber diameter from your selection on fleece weight.D. You contracted with a university to perform a genetic…
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