Which of the following would not be an example of a quantitative trait? O All of these are quantitative O Polydactyly in chimps O Birth body length of dalmatians Weight of humpback whales Blood pressure in black bears

Three modes of selection: The Directional Selection bigger is always better, Stabilizing Selection either extreme isn't useful and Disruptive Selection both extremes do well. Why would intermediate do worst in Disruptive Selection?

Webbed fingers, or syndactyly, are caused by a dominant trait found in 1 in 3000 births. What is theallele frequency of webbed fingers in the population

In domesticated dogs, size has a high heritability, andthe trait is determined by only a small number ofgenes. In contrast, genetic variation at more than180 QTLs explains only a very small proportion ofthe high heritability for height in humans. What couldexplain the missing heritability in humans, and howcould you test your hypothesized explanations?

The two questions below are confusing

TRAITS HERITABILITY Cutting Ability Racing Speed Jumping Ability Broad sense 0.53 0.55 0.55 Narrow sense 0.42 0.28 0.31   Which trait would have the best response for the selection for breeding purposes? Explain.

A wild population of pea plants has two alleles forflower color in its gene pool. A dominant allele (P)specifies purple flowers; a recessive allele (p) specifieswhite flowers. If the frequency of allele P is 0.75, what isthe expected frequency of allele p?

Were any of your physical traits analogous? Which ones? Why do you suppose some traits can occur multiple times on a tree while others don’t?

Which of the following principles of selection are true for both the sickle cell and rock pocket mice examples? Check all that apply. (1 or more are correct). Group of answer choices A_The same genotype can have higher fitness in one environment, but lower fitness in another environment B-Some genotypes have higher fitness than other genotypes C-Some genotypes have lower fitness than other genotypes

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…