In a certain breed of chicken, an incompletely dominant gene controls color. The homozygous black,
when crossed with the homozygous splashed-white, produces an intermediate gray color pattern called
blue. A second gene controls the shape of the comb. The dominant allele (R) produces rose, while the
recessive allele (r) produces single. Give the F1 and F2 genotypic and phenotypic ratios of a cross
between a pure-breeding, black single and a pure-breeding, splashed-white rose. What will be an ideal response?
F1: Bb Rr blue rose; F2: 3 BB R_ black rose, 6 Bb R_ blue rose, 3 bb R_ splashed-white rose, 1 BB rr
black single, 2 Bb rr blue single, 1 bb rr splashed-white single
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Briefly describe how your feet differ from those of the pig.
What will be an ideal response?
____ of our food crops are the fruits of angiosperms
a. About 10% b. About 25% c. About half d. Nearly all e. Hardly any
Vampire squid (Vampyroteuthisinfernalis) are deep-sea cephalopods with features similar to both octopus and squid. Extensive video recordings show the diet of the vampire squid consists of items like crustacean remains and fecal pellets. Which of the following terms describes the position of the vampire squid in the deep-sea trophic pyramid?
A. herbivore B. primary producer C. primary carnivore D. secondary carnivore E. detritivore Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about trophic levels? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
You paid $1,000,000 to purchase a black Angus bull named Maxwell that was advertised as a "pure-breeding" black Angus cow (BB; B = black and b = brown; B is dominant to b)
You mated Maxwell with Bessie, who also was advertised as a pure-breeding black Angus cow (BB); as you expected, all of their offspring were black. Several years later, you mated a pair of these offspring several times (F1 × F1) and found that approximately 25% of the F2 progeny were brown instead of black. What were the actual genotypes of the original cross (Maxwell × Bessie)? A) BB × BB B) Bb × BB C) Bb × Bb D) BB × bb E) bb × bb