Experienced chicken sexers can tell you a chick's sex at a glance, yet cannot tell you how they do it. Their acquired expertise is such an automatic habit that it feels like an algorithm. a fixation. intuition. divergent thinking.
Added by Cristina B.
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Observation: Experienced chicken sexers observe the physical characteristics of the chick. Show more…
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The X-linked barred locus in chickens controls the pattern of the feathers, with the alleles $B$ for barred pattern and $b$ for no bars. If a barred female $\left(X^{B} Y\right)$ is mated to a nonbarred male $\left(X^{b} X^{b}\right)$, what will be the appearance of the male and female progeny? (Recall that in birds males are $\mathrm{XX}$ and females are XY.) Do you see any commercial usefulness for this result? (Hint: It is notoriously difficult to determine the sex of newly hatched chicks.)
Suppose you observe a bird with a very broad and thick beak. You want to know why the bird's beak is shaped that way. How could you begin to use the scientific inquiry process to explore this question? Check all of the boxes that apply. Make more observations of how the bird uses its beak. List all the ways this bird could use its broad, thick beak. Ask a question about one of the ways the bird uses its beak. Design a way to test the question.
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An experiment was conducted to measure the effectiveness of various feed supplements on the growth rate of chickens. A five number summary of the weights of the chicks in grams six weeks after hatching is as follows. Source: Anonymous (1948) Biometrika, 35, 214. Min = 106 Q1 = 203 Median = 254 Q3 = 314 Max = 413 1. About percent of the chicks weigh more than 203. 2. About percent of the chicks weigh more than 254. 3. About percent of the chicks weigh more than 314. 4. About percent of the chicks weigh between 203 and 314.
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