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TLS Online TPP Program

#Question id: 1021

Disease Control (CDC) determine that the agent causing the birds to die is the West Nile virus. Outbreaks of this illness have been observed in several other countries in Asia and the Middle East across the last 50 years, but not in the United States. With this information, what would be the best categorization of this infectious agent/disease

#Unit 4. Cell Communication and Cell Signaling

  1. This is clearly a reemerging infection. It's been around for a long time, and it is reappearing in a susceptible population again.

  2. This is clearly a nosocomial infection. It's transmitted from animals to human beings in urban environments.

  3. This is clearly an emerging infection. It hasn't been around that long, and it has made a jump across continents into a new susceptible population.

  4. This is clearly not a concern to human beings--maybe it's emerging in animals, maybe it's reemerging, maybe it's nosomial. But who cares? It's only in birds.

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TLS Online TPP Program

#Question id: 3535

#Unit 8. Inheritance Biology

Phenotypic plasticity refers to  
TLS Online TPP Program

#Question id: 3536

#Unit 8. Inheritance Biology

What is the probability that selfing an F1 plant from Mendel dihybrid cross ( RrYy X RrYy) will produce an offspring with an rrYY genotype?
TLS Online TPP Program

#Question id: 3537

#Unit 8. Inheritance Biology

What is the probability of two offspring in which one dominant phenotype and one recessive phenotype from the mating Aa × Aa?
TLS Online TPP Program

#Question id: 3538

#Unit 8. Inheritance Biology

Monohybrid cross allowed between heterozygous Rr (Round) and RR (Round), all progeny having Round seeded plant were allowed to self-fertilize to produce numerous progeny that are 
TLS Online TPP Program

#Question id: 3539

#Unit 8. Inheritance Biology

In cucumbers, orange fruit color (R) is dominant over cream fruit color (r). A cucumber plant homozygous for orange fruits is crossed with a plant homozygous for cream fruits. What are phenotype of progeny if backcross between the F1 and the orange parent.
TLS Online TPP Program

#Question id: 3540

#Unit 8. Inheritance Biology

You set up an experiment in which you breed two populations of true-breeding pea plants. The first true-breeding population has yellow round seeds and the second has green wrinkled seeds. All of the F1 plants yield yellow round seeds. When you self -fertilize the F1 the F2 generation yields a mixture of yellow round, yellow wrinkled, green round and green wrinkled seeds. What does this tell you about the alleles for seed color and shape?