TLS Online TPP Program

#Question id: 6987


Which of the following statements about axon-guidance is TRUE?

#SCPH06 I Botany
  1. Netrins are long-range cues for chemorepulsion
  2. Semaphorins are short-range cues for chemorepulsion
  3. Cadherins are short-range cues for contact attraction
  4. Ephrins are short-range cues for contact attraction
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TLS Online TPP Program

#Question id: 5220

#SCPH06 I Botany

In comparing the genomes of humans and those of other higher primates, it is seen that humans have a large metacentric pair we call chromosome #2 among our 46 chromosomes, while the other primates of this group have 48 chromosomes and any pair like the human #2 pair is not present; instead the primate groups each have two pairs of midsize acrocentric chromosomes. What is the most likely explanation?

TLS Online TPP Program

#Question id: 5220

#SCPH28 | Zoology

In comparing the genomes of humans and those of other higher primates, it is seen that humans have a large metacentric pair we call chromosome #2 among our 46 chromosomes, while the other primates of this group have 48 chromosomes and any pair like the human #2 pair is not present; instead the primate groups each have two pairs of midsize acrocentric chromosomes. What is the most likely explanation?

TLS Online TPP Program

#Question id: 5221

#SCPH06 I Botany

Unequal crossing over during Prophase I can result in one sister chromosome with a deletion and another with a duplication. A mutated form of hemoglobin, known as hemoglobin Lepore, is known in the human population. Hemoglobin Lepore has a deleted set of amino acids. If it was caused by unequal crossing over, what would be an expected consequence?

TLS Online TPP Program

#Question id: 5221

#SCPH28 | Zoology

Unequal crossing over during Prophase I can result in one sister chromosome with a deletion and another with a duplication. A mutated form of hemoglobin, known as hemoglobin Lepore, is known in the human population. Hemoglobin Lepore has a deleted set of amino acids. If it was caused by unequal crossing over, what would be an expected consequence?

TLS Online TPP Program

#Question id: 5222

#SCPH06 I Botany

 When does exon shuffling occur?

TLS Online TPP Program

#Question id: 5222

#SCPH28 | Zoology

 When does exon shuffling occur?