Estimates of broad sense heritability for the commercially important trait "first lactation milk" in dairy cows have nearly doubled from ~0.25 in the 1970's to ~0.4 today. Which of the following can explain this increase? All of these can explain the increase O The number of genes impacting the first lactation milk phenotype is higher now than it was in the 1970s O Dairy cows are reared in more uniform environments now than they were in the 1970s O Dairy cows are more genetically uniform now than they were in the 1970s

Estimates of broad sense heritability for the commercially important trait "first lactation milk" in dairy cows have nearly doubled from ~0.25 in the 1970's to ~0.4 today. Which of the following can explain this increase? All of these can explain the increase O The number of genes impacting the first lactation milk phenotype is higher now than it was in the 1970s O Dairy cows are reared in more uniform environments now than they were in the 1970s O Dairy cows are more genetically uniform now than they were in the 1970s

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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true for false? 1a) In Drosophila flies, there are wing shapes such as curly, apterous, miniature and others. These would be considered continuous traits (as opposed to discontinuous traits). 1b) The reason we assess the narrow sense heritability is because there are hidden genetic components that are simply too difficult to include in the calculation of VG 1c) You can figure out the heritability of a trait if you compare the variation of the trait in a clonal population of organisms to a wild type (heterogeneous) population.
please dont copy ur answer from chegg since the answers there on this quiestion are not correct/reliable
Pitcher plants can take many forms. You are interested in understanding the genetic control of pitcher formation in pitcher plants. Which of the following is not likely a result you would expect from your QTL study? AV O a. Variation in pitcher size in your F2 population does not exceed that of your parental generation. O b. You were able to reconstitute the phenotypes of the parental generation by selectively breeding F2 individuals. O c. The variation in phenotypes is greater in the F1 population compared to the F2 population. O d. The phenotypes you are interested exhibit a typical Mendelian inheritance.
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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…
What describes the phenotypic plasticity of an organism best? O the degree of which individuals can change over time by altering their genotype O the effect of variable environment on the genotype of an organism O the variation of the target phenotype for a given genotype in different environments O the change of a phenotype due to ingestion of detrimental plastic material (as for instance plastic straws by sea turtles). O the degree of which a given genotype is adapted to a particular environment
How can you recognize codominance? The alleles affect more than one trait. O The trait exhibits continuous variation The heterozygote expresses the phenotypes coded for by both alleles O The phenotype of the heterozygote is intermediate between the phenotypes of the homozygotes. 梦 24 近
elp Normal ▾ B IU A - 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). M BEE 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 harvested 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…
Table 5. Composition of F1 generation (Character Wild ΤΟΤΑL number 66 Phenotype Male Female Dominant trait Wild Type 37 29 Recessive trait Tetrapter 9. 9. 18 1. Based on the data shown in Table 5, is it possible to determine the genotypes of all flies showing the dominant trait? Why or why not? 2. Is it possible to determine the genotypes of all flies showing the recessive trait? Why or why not?
How do you solve this problem?