TLS Online TPP Program

#Question id: 2148


The specificity of the potassium channel for K+ over Na+ is mainly the result of the:

#SCPH28 | Zoology
  1. differential interaction with the selectivity filter protein.

  2. hydrophobicity of the channel.

  3. phospholipid composition of the channel.

  4. presence of carbohydrates in the channel.

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TLS Online TPP Program

#Question id: 3539

#SCPH12 I Genetics

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

#SCPH01 Biochemistry

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?

TLS Online TPP Program

#Question id: 3540

#SCPH12 I Genetics

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?

TLS Online TPP Program

#Question id: 3541

#SCPH01 Biochemistry

Blue follower is dominant over white flower and long pollen is dominant over short pollen. A plant with Blue flower and short pollen was cross with white flower and long pollen. All F1 offspring display blue flower and long pollen. What is the percent of F2 progeny showing blue flower and long pollen?

TLS Online TPP Program

#Question id: 3541

#SCPH12 I Genetics

Blue follower is dominant over white flower and long pollen is dominant over short pollen. A plant with Blue flower and short pollen was cross with white flower and long pollen. All F1 offspring display blue flower and long pollen. What is the percent of F2 progeny showing blue flower and long pollen?

TLS Online TPP Program

#Question id: 3542

#SCPH01 Biochemistry

All genes are not linked. The probability of a progeny being AaBBccDd from a corss between AABbccDd and aaBBccDD parents will be