TLS Online TPP Program

#Question id: 4632


Which of these conditions should completely prevent the occurrence of natural selection in a population over time?

#XL - S Microbiology
  1. All variation between individuals is due only to environmental factors.

  2. The environment is changing at a relatively slow rate.

  3. The population size is large.

  4. The population lives in a habitat where there are no competing species present.

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TLS Online TPP Program

#Question id: 4907

#XL - T Zoology

Two corn plants are studied. One is resistant (R) and the other is susceptible (S) to a certain pathogenic fungus. The following crosses are made, with the results shown

R male X S female = all S progeny

R female X S male = all R progeny

Which of the following are correct about inheritance?

TLS Online TPP Program

#Question id: 4907

#XL - R Botany

Two corn plants are studied. One is resistant (R) and the other is susceptible (S) to a certain pathogenic fungus. The following crosses are made, with the results shown

R male X S female = all S progeny

R female X S male = all R progeny

Which of the following are correct about inheritance?

TLS Online TPP Program

#Question id: 4908

#XL - T Zoology

Shell coiling of the snail is maternal effect phenotype control by S gene, where S Dextral is dominant over s sinistral. If snail sinistral coiled shell, which of the following statement is true

TLS Online TPP Program

#Question id: 4909

#XL - T Zoology

A pattern of transmission where all offspring have the same phenotype as their mother is consistent with which type of non-Mendelian inheritance?

TLS Online TPP Program

#Question id: 4909

#XL - R Botany

A pattern of transmission where all offspring have the same phenotype as their mother is consistent with which type of non-Mendelian inheritance?

TLS Online TPP Program

#Question id: 4910

#XL - R Botany

For a trait known to be caused by a mitochondrial gene variant, there may be an occasional female that can transmit different phenotypes to her progeny on an apparently random basis. What situation might you suspect?