TLS Online TPP Program

#Question id: 2962


Which of the following experimental observations (some real, some contrived) would not be consistent with our current understanding of cytokinesis?

#SCPH01 Biochemistry
  1. Anti-myosin antibodies injected in a dividing cell cause cytokinesis to stop.

  2. When the myosin II gene is mutated, cells undergo nuclear division, but not cytokinesis.

  3. Anti-actin antibodies injected into dividing cells have no effect on cytokinesis.

  4. Actin filaments seen in micrographs are aligned parallel to the cleavage furrow.

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TLS Online TPP Program

#Question id: 5219

#SCPH06 I Botany

What is it that can be duplicated in a genome?

TLS Online TPP Program

#Question id: 5219

#SCPH28 | Zoology

What is it that can be duplicated in a genome?

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?