Fertilization produces a
What will be an ideal response?
zygote
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NOTE: The following questions with Punnet squares reflect on a consistent observation that students can commonly use Punnet squares easily, but frequently make mistakes setting them up
STEM/DATA In a population of wild-caught flies, you are focusing on the trait of bristle length. You find that the trait varies between two phenotypes where some flies have long bristles while others have very short bristles. You set up several matings between individual flies from this mixed population and observe the following results in the offspring: Mating # male parent female parent offspring phenotypes 1. long long all long 2. long long all long 3. short short some long, some short 4. short short all short 5. long short all short 6. long short some long, some short 7. short long some long, some short 8. short long all short The male and female offspring have the same chance of having either long or short bristles in each cross. Which phenotype is recessive? A. long B. short
In pines, the mature male gametophyte is called the ____
a. flagellated sperm b. pollen cone c. pollen tube d. pollen grain e. pollination drop
Vertebrate colonization of terrestrial habitats
increased dramatically with the evolution of a. lungs. b. paired appendages. c. shelled eggs. d. the four-chambered heart. e. scales.
Neutrophils are inhibited from gathering at the site of infection by Mycobacterium tuberculosis by what virulence factor of the pathogen?
A) mycolic acid B) cord factor C) kinase D) the capsule E) hemolysin